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777 lines
20 KiB
777 lines
20 KiB
/* hermes.c |
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* |
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* Driver core for the "Hermes" wireless MAC controller, as used in |
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* the Lucent Orinoco and Cabletron RoamAbout cards. It should also |
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* work on the hfa3841 and hfa3842 MAC controller chips used in the |
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* Prism II chipsets. |
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* |
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* This is not a complete driver, just low-level access routines for |
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* the MAC controller itself. |
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* |
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* Based on the prism2 driver from Absolute Value Systems' linux-wlan |
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* project, the Linux wvlan_cs driver, Lucent's HCF-Light |
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* (wvlan_hcf.c) library, and the NetBSD wireless driver (in no |
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* particular order). |
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* |
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* Copyright (C) 2000, David Gibson, Linuxcare Australia. |
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* (C) Copyright David Gibson, IBM Corp. 2001-2003. |
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* |
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* The contents of this file are subject to the Mozilla Public License |
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* Version 1.1 (the "License"); you may not use this file except in |
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* compliance with the License. You may obtain a copy of the License |
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* at http://www.mozilla.org/MPL/ |
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* |
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* Software distributed under the License is distributed on an "AS IS" |
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See |
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* the License for the specific language governing rights and |
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* limitations under the License. |
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* |
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* Alternatively, the contents of this file may be used under the |
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* terms of the GNU General Public License version 2 (the "GPL"), in |
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* which case the provisions of the GPL are applicable instead of the |
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* above. If you wish to allow the use of your version of this file |
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* only under the terms of the GPL and not to allow others to use your |
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* version of this file under the MPL, indicate your decision by |
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* deleting the provisions above and replace them with the notice and |
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* other provisions required by the GPL. If you do not delete the |
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* provisions above, a recipient may use your version of this file |
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* under either the MPL or the GPL. |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/delay.h> |
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|
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#include "hermes.h" |
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|
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/* These are maximum timeouts. Most often, card wil react much faster */ |
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#define CMD_BUSY_TIMEOUT (100) /* In iterations of ~1us */ |
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#define CMD_INIT_TIMEOUT (50000) /* in iterations of ~10us */ |
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#define CMD_COMPL_TIMEOUT (20000) /* in iterations of ~10us */ |
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#define ALLOC_COMPL_TIMEOUT (1000) /* in iterations of ~10us */ |
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|
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/* |
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* AUX port access. To unlock the AUX port write the access keys to the |
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* PARAM0-2 registers, then write HERMES_AUX_ENABLE to the HERMES_CONTROL |
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* register. Then read it and make sure it's HERMES_AUX_ENABLED. |
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*/ |
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#define HERMES_AUX_ENABLE 0x8000 /* Enable auxiliary port access */ |
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#define HERMES_AUX_DISABLE 0x4000 /* Disable to auxiliary port access */ |
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#define HERMES_AUX_ENABLED 0xC000 /* Auxiliary port is open */ |
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#define HERMES_AUX_DISABLED 0x0000 /* Auxiliary port is closed */ |
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|
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#define HERMES_AUX_PW0 0xFE01 |
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#define HERMES_AUX_PW1 0xDC23 |
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#define HERMES_AUX_PW2 0xBA45 |
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|
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/* HERMES_CMD_DOWNLD */ |
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#define HERMES_PROGRAM_DISABLE (0x0000 | HERMES_CMD_DOWNLD) |
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#define HERMES_PROGRAM_ENABLE_VOLATILE (0x0100 | HERMES_CMD_DOWNLD) |
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#define HERMES_PROGRAM_ENABLE_NON_VOLATILE (0x0200 | HERMES_CMD_DOWNLD) |
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#define HERMES_PROGRAM_NON_VOLATILE (0x0300 | HERMES_CMD_DOWNLD) |
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|
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/* |
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* Debugging helpers |
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*/ |
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#define DMSG(stuff...) do {printk(KERN_DEBUG "hermes @ %p: " , hw->iobase); \ |
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printk(stuff); } while (0) |
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#undef HERMES_DEBUG |
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#ifdef HERMES_DEBUG |
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#define DEBUG(lvl, stuff...) if ((lvl) <= HERMES_DEBUG) DMSG(stuff) |
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#else /* ! HERMES_DEBUG */ |
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#define DEBUG(lvl, stuff...) do { } while (0) |
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#endif /* ! HERMES_DEBUG */ |
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static const struct hermes_ops hermes_ops_local; |
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|
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/* |
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* Internal functions |
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*/ |
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|
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/* Issue a command to the chip. Waiting for it to complete is the caller's |
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problem. |
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Returns -EBUSY if the command register is busy, 0 on success. |
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Callable from any context. |
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*/ |
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static int hermes_issue_cmd(struct hermes *hw, u16 cmd, u16 param0, |
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u16 param1, u16 param2) |
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{ |
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int k = CMD_BUSY_TIMEOUT; |
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u16 reg; |
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|
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/* First wait for the command register to unbusy */ |
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reg = hermes_read_regn(hw, CMD); |
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while ((reg & HERMES_CMD_BUSY) && k) { |
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k--; |
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udelay(1); |
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reg = hermes_read_regn(hw, CMD); |
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} |
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if (reg & HERMES_CMD_BUSY) |
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return -EBUSY; |
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hermes_write_regn(hw, PARAM2, param2); |
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hermes_write_regn(hw, PARAM1, param1); |
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hermes_write_regn(hw, PARAM0, param0); |
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hermes_write_regn(hw, CMD, cmd); |
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return 0; |
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} |
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/* |
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* Function definitions |
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*/ |
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/* For doing cmds that wipe the magic constant in SWSUPPORT0 */ |
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static int hermes_doicmd_wait(struct hermes *hw, u16 cmd, |
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u16 parm0, u16 parm1, u16 parm2, |
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struct hermes_response *resp) |
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{ |
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int err = 0; |
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int k; |
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u16 status, reg; |
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err = hermes_issue_cmd(hw, cmd, parm0, parm1, parm2); |
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if (err) |
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return err; |
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reg = hermes_read_regn(hw, EVSTAT); |
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k = CMD_INIT_TIMEOUT; |
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while ((!(reg & HERMES_EV_CMD)) && k) { |
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k--; |
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udelay(10); |
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reg = hermes_read_regn(hw, EVSTAT); |
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} |
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hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC); |
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if (!hermes_present(hw)) { |
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DEBUG(0, "hermes @ 0x%x: Card removed during reset.\n", |
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hw->iobase); |
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err = -ENODEV; |
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goto out; |
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} |
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if (!(reg & HERMES_EV_CMD)) { |
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printk(KERN_ERR "hermes @ %p: " |
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"Timeout waiting for card to reset (reg=0x%04x)!\n", |
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hw->iobase, reg); |
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err = -ETIMEDOUT; |
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goto out; |
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} |
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status = hermes_read_regn(hw, STATUS); |
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if (resp) { |
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resp->status = status; |
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resp->resp0 = hermes_read_regn(hw, RESP0); |
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resp->resp1 = hermes_read_regn(hw, RESP1); |
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resp->resp2 = hermes_read_regn(hw, RESP2); |
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} |
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hermes_write_regn(hw, EVACK, HERMES_EV_CMD); |
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if (status & HERMES_STATUS_RESULT) |
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err = -EIO; |
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out: |
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return err; |
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} |
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void hermes_struct_init(struct hermes *hw, void __iomem *address, |
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int reg_spacing) |
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{ |
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hw->iobase = address; |
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hw->reg_spacing = reg_spacing; |
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hw->inten = 0x0; |
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hw->eeprom_pda = false; |
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hw->ops = &hermes_ops_local; |
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} |
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EXPORT_SYMBOL(hermes_struct_init); |
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static int hermes_init(struct hermes *hw) |
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{ |
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u16 reg; |
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int err = 0; |
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int k; |
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/* We don't want to be interrupted while resetting the chipset */ |
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hw->inten = 0x0; |
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hermes_write_regn(hw, INTEN, 0); |
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hermes_write_regn(hw, EVACK, 0xffff); |
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/* Normally it's a "can't happen" for the command register to |
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be busy when we go to issue a command because we are |
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serializing all commands. However we want to have some |
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chance of resetting the card even if it gets into a stupid |
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state, so we actually wait to see if the command register |
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will unbusy itself here. */ |
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k = CMD_BUSY_TIMEOUT; |
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reg = hermes_read_regn(hw, CMD); |
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while (k && (reg & HERMES_CMD_BUSY)) { |
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if (reg == 0xffff) /* Special case - the card has probably been |
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removed, so don't wait for the timeout */ |
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return -ENODEV; |
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k--; |
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udelay(1); |
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reg = hermes_read_regn(hw, CMD); |
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} |
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/* No need to explicitly handle the timeout - if we've timed |
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out hermes_issue_cmd() will probably return -EBUSY below */ |
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/* According to the documentation, EVSTAT may contain |
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obsolete event occurrence information. We have to acknowledge |
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it by writing EVACK. */ |
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reg = hermes_read_regn(hw, EVSTAT); |
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hermes_write_regn(hw, EVACK, reg); |
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/* We don't use hermes_docmd_wait here, because the reset wipes |
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the magic constant in SWSUPPORT0 away, and it gets confused */ |
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err = hermes_doicmd_wait(hw, HERMES_CMD_INIT, 0, 0, 0, NULL); |
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return err; |
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} |
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/* Issue a command to the chip, and (busy!) wait for it to |
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* complete. |
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* |
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* Returns: |
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* < 0 on internal error |
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* 0 on success |
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* > 0 on error returned by the firmware |
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* |
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* Callable from any context, but locking is your problem. */ |
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static int hermes_docmd_wait(struct hermes *hw, u16 cmd, u16 parm0, |
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struct hermes_response *resp) |
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{ |
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int err; |
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int k; |
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u16 reg; |
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u16 status; |
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err = hermes_issue_cmd(hw, cmd, parm0, 0, 0); |
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if (err) { |
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if (!hermes_present(hw)) { |
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if (net_ratelimit()) |
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printk(KERN_WARNING "hermes @ %p: " |
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"Card removed while issuing command " |
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"0x%04x.\n", hw->iobase, cmd); |
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err = -ENODEV; |
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} else |
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if (net_ratelimit()) |
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printk(KERN_ERR "hermes @ %p: " |
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"Error %d issuing command 0x%04x.\n", |
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hw->iobase, err, cmd); |
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goto out; |
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} |
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reg = hermes_read_regn(hw, EVSTAT); |
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k = CMD_COMPL_TIMEOUT; |
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while ((!(reg & HERMES_EV_CMD)) && k) { |
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k--; |
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udelay(10); |
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reg = hermes_read_regn(hw, EVSTAT); |
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} |
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if (!hermes_present(hw)) { |
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printk(KERN_WARNING "hermes @ %p: Card removed " |
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"while waiting for command 0x%04x completion.\n", |
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hw->iobase, cmd); |
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err = -ENODEV; |
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goto out; |
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} |
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if (!(reg & HERMES_EV_CMD)) { |
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printk(KERN_ERR "hermes @ %p: Timeout waiting for " |
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"command 0x%04x completion.\n", hw->iobase, cmd); |
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err = -ETIMEDOUT; |
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goto out; |
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} |
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status = hermes_read_regn(hw, STATUS); |
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if (resp) { |
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resp->status = status; |
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resp->resp0 = hermes_read_regn(hw, RESP0); |
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resp->resp1 = hermes_read_regn(hw, RESP1); |
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resp->resp2 = hermes_read_regn(hw, RESP2); |
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} |
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hermes_write_regn(hw, EVACK, HERMES_EV_CMD); |
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if (status & HERMES_STATUS_RESULT) |
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err = -EIO; |
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out: |
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return err; |
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} |
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static int hermes_allocate(struct hermes *hw, u16 size, u16 *fid) |
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{ |
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int err = 0; |
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int k; |
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u16 reg; |
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if ((size < HERMES_ALLOC_LEN_MIN) || (size > HERMES_ALLOC_LEN_MAX)) |
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return -EINVAL; |
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err = hermes_docmd_wait(hw, HERMES_CMD_ALLOC, size, NULL); |
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if (err) |
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return err; |
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reg = hermes_read_regn(hw, EVSTAT); |
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k = ALLOC_COMPL_TIMEOUT; |
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while ((!(reg & HERMES_EV_ALLOC)) && k) { |
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k--; |
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udelay(10); |
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reg = hermes_read_regn(hw, EVSTAT); |
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} |
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if (!hermes_present(hw)) { |
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printk(KERN_WARNING "hermes @ %p: " |
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"Card removed waiting for frame allocation.\n", |
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hw->iobase); |
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return -ENODEV; |
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} |
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if (!(reg & HERMES_EV_ALLOC)) { |
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printk(KERN_ERR "hermes @ %p: " |
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"Timeout waiting for frame allocation\n", |
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hw->iobase); |
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return -ETIMEDOUT; |
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} |
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*fid = hermes_read_regn(hw, ALLOCFID); |
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hermes_write_regn(hw, EVACK, HERMES_EV_ALLOC); |
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return 0; |
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} |
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/* Set up a BAP to read a particular chunk of data from card's internal buffer. |
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* |
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* Returns: |
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* < 0 on internal failure (errno) |
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* 0 on success |
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* > 0 on error |
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* from firmware |
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* |
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* Callable from any context */ |
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static int hermes_bap_seek(struct hermes *hw, int bap, u16 id, u16 offset) |
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{ |
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int sreg = bap ? HERMES_SELECT1 : HERMES_SELECT0; |
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int oreg = bap ? HERMES_OFFSET1 : HERMES_OFFSET0; |
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int k; |
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u16 reg; |
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/* Paranoia.. */ |
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if ((offset > HERMES_BAP_OFFSET_MAX) || (offset % 2)) |
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return -EINVAL; |
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k = HERMES_BAP_BUSY_TIMEOUT; |
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reg = hermes_read_reg(hw, oreg); |
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while ((reg & HERMES_OFFSET_BUSY) && k) { |
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k--; |
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udelay(1); |
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reg = hermes_read_reg(hw, oreg); |
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} |
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if (reg & HERMES_OFFSET_BUSY) |
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return -ETIMEDOUT; |
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/* Now we actually set up the transfer */ |
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hermes_write_reg(hw, sreg, id); |
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hermes_write_reg(hw, oreg, offset); |
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|
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/* Wait for the BAP to be ready */ |
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k = HERMES_BAP_BUSY_TIMEOUT; |
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reg = hermes_read_reg(hw, oreg); |
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while ((reg & (HERMES_OFFSET_BUSY | HERMES_OFFSET_ERR)) && k) { |
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k--; |
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udelay(1); |
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reg = hermes_read_reg(hw, oreg); |
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} |
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if (reg != offset) { |
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printk(KERN_ERR "hermes @ %p: BAP%d offset %s: " |
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"reg=0x%x id=0x%x offset=0x%x\n", hw->iobase, bap, |
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(reg & HERMES_OFFSET_BUSY) ? "timeout" : "error", |
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reg, id, offset); |
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if (reg & HERMES_OFFSET_BUSY) |
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return -ETIMEDOUT; |
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return -EIO; /* error or wrong offset */ |
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} |
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return 0; |
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} |
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|
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/* Read a block of data from the chip's buffer, via the |
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* BAP. Synchronization/serialization is the caller's problem. len |
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* must be even. |
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* |
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* Returns: |
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* < 0 on internal failure (errno) |
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* 0 on success |
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* > 0 on error from firmware |
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*/ |
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static int hermes_bap_pread(struct hermes *hw, int bap, void *buf, int len, |
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u16 id, u16 offset) |
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{ |
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int dreg = bap ? HERMES_DATA1 : HERMES_DATA0; |
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int err = 0; |
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if ((len < 0) || (len % 2)) |
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return -EINVAL; |
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err = hermes_bap_seek(hw, bap, id, offset); |
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if (err) |
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goto out; |
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/* Actually do the transfer */ |
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hermes_read_words(hw, dreg, buf, len / 2); |
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|
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out: |
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return err; |
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} |
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|
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/* Write a block of data to the chip's buffer, via the |
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* BAP. Synchronization/serialization is the caller's problem. |
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* |
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* Returns: |
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* < 0 on internal failure (errno) |
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* 0 on success |
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* > 0 on error from firmware |
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*/ |
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static int hermes_bap_pwrite(struct hermes *hw, int bap, const void *buf, |
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int len, u16 id, u16 offset) |
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{ |
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int dreg = bap ? HERMES_DATA1 : HERMES_DATA0; |
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int err = 0; |
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|
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if (len < 0) |
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return -EINVAL; |
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err = hermes_bap_seek(hw, bap, id, offset); |
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if (err) |
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goto out; |
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|
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/* Actually do the transfer */ |
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hermes_write_bytes(hw, dreg, buf, len); |
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|
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out: |
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return err; |
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} |
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|
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/* Read a Length-Type-Value record from the card. |
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* |
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* If length is NULL, we ignore the length read from the card, and |
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* read the entire buffer regardless. This is useful because some of |
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* the configuration records appear to have incorrect lengths in |
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* practice. |
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* |
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* Callable from user or bh context. */ |
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static int hermes_read_ltv(struct hermes *hw, int bap, u16 rid, |
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unsigned bufsize, u16 *length, void *buf) |
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{ |
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int err = 0; |
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int dreg = bap ? HERMES_DATA1 : HERMES_DATA0; |
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u16 rlength, rtype; |
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unsigned nwords; |
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|
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if (bufsize % 2) |
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return -EINVAL; |
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err = hermes_docmd_wait(hw, HERMES_CMD_ACCESS, rid, NULL); |
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if (err) |
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return err; |
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err = hermes_bap_seek(hw, bap, rid, 0); |
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if (err) |
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return err; |
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rlength = hermes_read_reg(hw, dreg); |
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|
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if (!rlength) |
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return -ENODATA; |
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rtype = hermes_read_reg(hw, dreg); |
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if (length) |
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*length = rlength; |
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if (rtype != rid) |
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printk(KERN_WARNING "hermes @ %p: %s(): " |
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"rid (0x%04x) does not match type (0x%04x)\n", |
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hw->iobase, __func__, rid, rtype); |
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if (HERMES_RECLEN_TO_BYTES(rlength) > bufsize) |
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printk(KERN_WARNING "hermes @ %p: " |
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"Truncating LTV record from %d to %d bytes. " |
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"(rid=0x%04x, len=0x%04x)\n", hw->iobase, |
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HERMES_RECLEN_TO_BYTES(rlength), bufsize, rid, rlength); |
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nwords = min((unsigned)rlength - 1, bufsize / 2); |
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hermes_read_words(hw, dreg, buf, nwords); |
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|
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return 0; |
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} |
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static int hermes_write_ltv(struct hermes *hw, int bap, u16 rid, |
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u16 length, const void *value) |
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{ |
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int dreg = bap ? HERMES_DATA1 : HERMES_DATA0; |
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int err = 0; |
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unsigned count; |
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|
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if (length == 0) |
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return -EINVAL; |
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err = hermes_bap_seek(hw, bap, rid, 0); |
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if (err) |
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return err; |
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hermes_write_reg(hw, dreg, length); |
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hermes_write_reg(hw, dreg, rid); |
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|
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count = length - 1; |
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hermes_write_bytes(hw, dreg, value, count << 1); |
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err = hermes_docmd_wait(hw, HERMES_CMD_ACCESS | HERMES_CMD_WRITE, |
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rid, NULL); |
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|
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return err; |
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} |
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|
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/*** Hermes AUX control ***/ |
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|
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static inline void |
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hermes_aux_setaddr(struct hermes *hw, u32 addr) |
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{ |
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hermes_write_reg(hw, HERMES_AUXPAGE, (u16) (addr >> 7)); |
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hermes_write_reg(hw, HERMES_AUXOFFSET, (u16) (addr & 0x7F)); |
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} |
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|
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static inline int |
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hermes_aux_control(struct hermes *hw, int enabled) |
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{ |
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int desired_state = enabled ? HERMES_AUX_ENABLED : HERMES_AUX_DISABLED; |
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int action = enabled ? HERMES_AUX_ENABLE : HERMES_AUX_DISABLE; |
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int i; |
|
|
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/* Already open? */ |
|
if (hermes_read_reg(hw, HERMES_CONTROL) == desired_state) |
|
return 0; |
|
|
|
hermes_write_reg(hw, HERMES_PARAM0, HERMES_AUX_PW0); |
|
hermes_write_reg(hw, HERMES_PARAM1, HERMES_AUX_PW1); |
|
hermes_write_reg(hw, HERMES_PARAM2, HERMES_AUX_PW2); |
|
hermes_write_reg(hw, HERMES_CONTROL, action); |
|
|
|
for (i = 0; i < 20; i++) { |
|
udelay(10); |
|
if (hermes_read_reg(hw, HERMES_CONTROL) == |
|
desired_state) |
|
return 0; |
|
} |
|
|
|
return -EBUSY; |
|
} |
|
|
|
/*** Hermes programming ***/ |
|
|
|
/* About to start programming data (Hermes I) |
|
* offset is the entry point |
|
* |
|
* Spectrum_cs' Symbol fw does not require this |
|
* wl_lkm Agere fw does |
|
* Don't know about intersil |
|
*/ |
|
static int hermesi_program_init(struct hermes *hw, u32 offset) |
|
{ |
|
int err; |
|
|
|
/* Disable interrupts?*/ |
|
/*hw->inten = 0x0;*/ |
|
/*hermes_write_regn(hw, INTEN, 0);*/ |
|
/*hermes_set_irqmask(hw, 0);*/ |
|
|
|
/* Acknowledge any outstanding command */ |
|
hermes_write_regn(hw, EVACK, 0xFFFF); |
|
|
|
/* Using init_cmd_wait rather than cmd_wait */ |
|
err = hw->ops->init_cmd_wait(hw, |
|
0x0100 | HERMES_CMD_INIT, |
|
0, 0, 0, NULL); |
|
if (err) |
|
return err; |
|
|
|
err = hw->ops->init_cmd_wait(hw, |
|
0x0000 | HERMES_CMD_INIT, |
|
0, 0, 0, NULL); |
|
if (err) |
|
return err; |
|
|
|
err = hermes_aux_control(hw, 1); |
|
pr_debug("AUX enable returned %d\n", err); |
|
|
|
if (err) |
|
return err; |
|
|
|
pr_debug("Enabling volatile, EP 0x%08x\n", offset); |
|
err = hw->ops->init_cmd_wait(hw, |
|
HERMES_PROGRAM_ENABLE_VOLATILE, |
|
offset & 0xFFFFu, |
|
offset >> 16, |
|
0, |
|
NULL); |
|
pr_debug("PROGRAM_ENABLE returned %d\n", err); |
|
|
|
return err; |
|
} |
|
|
|
/* Done programming data (Hermes I) |
|
* |
|
* Spectrum_cs' Symbol fw does not require this |
|
* wl_lkm Agere fw does |
|
* Don't know about intersil |
|
*/ |
|
static int hermesi_program_end(struct hermes *hw) |
|
{ |
|
struct hermes_response resp; |
|
int rc = 0; |
|
int err; |
|
|
|
rc = hw->ops->cmd_wait(hw, HERMES_PROGRAM_DISABLE, 0, &resp); |
|
|
|
pr_debug("PROGRAM_DISABLE returned %d, " |
|
"r0 0x%04x, r1 0x%04x, r2 0x%04x\n", |
|
rc, resp.resp0, resp.resp1, resp.resp2); |
|
|
|
if ((rc == 0) && |
|
((resp.status & HERMES_STATUS_CMDCODE) != HERMES_CMD_DOWNLD)) |
|
rc = -EIO; |
|
|
|
err = hermes_aux_control(hw, 0); |
|
pr_debug("AUX disable returned %d\n", err); |
|
|
|
/* Acknowledge any outstanding command */ |
|
hermes_write_regn(hw, EVACK, 0xFFFF); |
|
|
|
/* Reinitialise, ignoring return */ |
|
(void) hw->ops->init_cmd_wait(hw, 0x0000 | HERMES_CMD_INIT, |
|
0, 0, 0, NULL); |
|
|
|
return rc ? rc : err; |
|
} |
|
|
|
static int hermes_program_bytes(struct hermes *hw, const char *data, |
|
u32 addr, u32 len) |
|
{ |
|
/* wl lkm splits the programming into chunks of 2000 bytes. |
|
* This restriction appears to come from USB. The PCMCIA |
|
* adapters can program the whole lot in one go */ |
|
hermes_aux_setaddr(hw, addr); |
|
hermes_write_bytes(hw, HERMES_AUXDATA, data, len); |
|
return 0; |
|
} |
|
|
|
/* Read PDA from the adapter */ |
|
static int hermes_read_pda(struct hermes *hw, __le16 *pda, u32 pda_addr, |
|
u16 pda_len) |
|
{ |
|
int ret; |
|
u16 pda_size; |
|
u16 data_len = pda_len; |
|
__le16 *data = pda; |
|
|
|
if (hw->eeprom_pda) { |
|
/* PDA of spectrum symbol is in eeprom */ |
|
|
|
/* Issue command to read EEPROM */ |
|
ret = hw->ops->cmd_wait(hw, HERMES_CMD_READMIF, 0, NULL); |
|
if (ret) |
|
return ret; |
|
} else { |
|
/* wl_lkm does not include PDA size in the PDA area. |
|
* We will pad the information into pda, so other routines |
|
* don't have to be modified */ |
|
pda[0] = cpu_to_le16(pda_len - 2); |
|
/* Includes CFG_PROD_DATA but not itself */ |
|
pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */ |
|
data_len = pda_len - 4; |
|
data = pda + 2; |
|
} |
|
|
|
/* Open auxiliary port */ |
|
ret = hermes_aux_control(hw, 1); |
|
pr_debug("AUX enable returned %d\n", ret); |
|
if (ret) |
|
return ret; |
|
|
|
/* Read PDA */ |
|
hermes_aux_setaddr(hw, pda_addr); |
|
hermes_read_words(hw, HERMES_AUXDATA, data, data_len / 2); |
|
|
|
/* Close aux port */ |
|
ret = hermes_aux_control(hw, 0); |
|
pr_debug("AUX disable returned %d\n", ret); |
|
|
|
/* Check PDA length */ |
|
pda_size = le16_to_cpu(pda[0]); |
|
pr_debug("Actual PDA length %d, Max allowed %d\n", |
|
pda_size, pda_len); |
|
if (pda_size > pda_len) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
static void hermes_lock_irqsave(spinlock_t *lock, |
|
unsigned long *flags) __acquires(lock) |
|
{ |
|
spin_lock_irqsave(lock, *flags); |
|
} |
|
|
|
static void hermes_unlock_irqrestore(spinlock_t *lock, |
|
unsigned long *flags) __releases(lock) |
|
{ |
|
spin_unlock_irqrestore(lock, *flags); |
|
} |
|
|
|
static void hermes_lock_irq(spinlock_t *lock) __acquires(lock) |
|
{ |
|
spin_lock_irq(lock); |
|
} |
|
|
|
static void hermes_unlock_irq(spinlock_t *lock) __releases(lock) |
|
{ |
|
spin_unlock_irq(lock); |
|
} |
|
|
|
/* Hermes operations for local buses */ |
|
static const struct hermes_ops hermes_ops_local = { |
|
.init = hermes_init, |
|
.cmd_wait = hermes_docmd_wait, |
|
.init_cmd_wait = hermes_doicmd_wait, |
|
.allocate = hermes_allocate, |
|
.read_ltv = hermes_read_ltv, |
|
.read_ltv_pr = hermes_read_ltv, |
|
.write_ltv = hermes_write_ltv, |
|
.bap_pread = hermes_bap_pread, |
|
.bap_pwrite = hermes_bap_pwrite, |
|
.read_pda = hermes_read_pda, |
|
.program_init = hermesi_program_init, |
|
.program_end = hermesi_program_end, |
|
.program = hermes_program_bytes, |
|
.lock_irqsave = hermes_lock_irqsave, |
|
.unlock_irqrestore = hermes_unlock_irqrestore, |
|
.lock_irq = hermes_lock_irq, |
|
.unlock_irq = hermes_unlock_irq, |
|
};
|
|
|