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156 lines
3.4 KiB
156 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/drivers/pcmcia/pxa2xx_lubbock.c |
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* |
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* Author: George Davis |
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* Created: Jan 10, 2002 |
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* Copyright: MontaVista Software Inc. |
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* |
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* Originally based upon linux/drivers/pcmcia/sa1100_neponset.c |
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* |
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* Lubbock PCMCIA specific routines. |
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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/device.h> |
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#include <linux/errno.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <mach/hardware.h> |
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#include <asm/hardware/sa1111.h> |
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#include <asm/mach-types.h> |
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#include "sa1111_generic.h" |
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#include "max1600.h" |
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static int lubbock_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
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{ |
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struct max1600 *m; |
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int ret; |
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ret = max1600_init(skt->socket.dev.parent, &m, |
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skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A, |
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MAX1600_CODE_HIGH); |
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if (ret == 0) |
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skt->driver_data = m; |
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return ret; |
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} |
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static int |
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lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
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const socket_state_t *state) |
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{ |
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struct max1600 *m = skt->driver_data; |
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int ret = 0; |
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/* Lubbock uses the Maxim MAX1602, with the following connections: |
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* |
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* Socket 0 (PCMCIA): |
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* MAX1602 Lubbock Register |
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* Pin Signal |
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* ----- ------- ---------------------- |
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* A0VPP S0_PWR0 SA-1111 GPIO A<0> |
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* A1VPP S0_PWR1 SA-1111 GPIO A<1> |
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* A0VCC S0_PWR2 SA-1111 GPIO A<2> |
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* A1VCC S0_PWR3 SA-1111 GPIO A<3> |
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* VX VCC |
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* VY +3.3V |
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* 12IN +12V |
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* CODE +3.3V Cirrus Code, CODE = High (VY) |
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* |
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* Socket 1 (CF): |
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* MAX1602 Lubbock Register |
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* Pin Signal |
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* ----- ------- ---------------------- |
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* A0VPP GND VPP is not connected |
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* A1VPP GND VPP is not connected |
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* A0VCC S1_PWR0 MISC_WR<14> |
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* A1VCC S1_PWR1 MISC_WR<15> |
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* VX VCC |
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* VY +3.3V |
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* 12IN GND VPP is not connected |
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* CODE +3.3V Cirrus Code, CODE = High (VY) |
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* |
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*/ |
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again: |
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switch (skt->nr) { |
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case 0: |
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case 1: |
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break; |
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default: |
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ret = -1; |
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} |
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if (ret == 0) |
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ret = sa1111_pcmcia_configure_socket(skt, state); |
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if (ret == 0) |
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ret = max1600_configure(m, state->Vcc, state->Vpp); |
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#if 1 |
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if (ret == 0 && state->Vcc == 33) { |
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struct pcmcia_state new_state; |
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/* |
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* HACK ALERT: |
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* We can't sense the voltage properly on Lubbock before |
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* actually applying some power to the socket (catch 22). |
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* Resense the socket Voltage Sense pins after applying |
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* socket power. |
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* |
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* Note: It takes about 2.5ms for the MAX1602 VCC output |
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* to rise. |
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*/ |
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mdelay(3); |
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sa1111_pcmcia_socket_state(skt, &new_state); |
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if (!new_state.vs_3v && !new_state.vs_Xv) { |
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/* |
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* Switch to 5V, Configure socket with 5V voltage |
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*/ |
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max1600_configure(m, 0, 0); |
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/* |
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* It takes about 100ms to turn off Vcc. |
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*/ |
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mdelay(100); |
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/* |
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* We need to hack around the const qualifier as |
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* well to keep this ugly workaround localized and |
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* not force it to the rest of the code. Barf bags |
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* available in the seat pocket in front of you! |
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*/ |
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((socket_state_t *)state)->Vcc = 50; |
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((socket_state_t *)state)->Vpp = 50; |
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goto again; |
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} |
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} |
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#endif |
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return ret; |
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} |
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static struct pcmcia_low_level lubbock_pcmcia_ops = { |
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.owner = THIS_MODULE, |
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.hw_init = lubbock_pcmcia_hw_init, |
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.configure_socket = lubbock_pcmcia_configure_socket, |
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.first = 0, |
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.nr = 2, |
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}; |
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#include "pxa2xx_base.h" |
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int pcmcia_lubbock_init(struct sa1111_dev *sadev) |
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{ |
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pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops); |
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pxa2xx_configure_sockets(&sadev->dev, &lubbock_pcmcia_ops); |
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return sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops, |
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pxa2xx_drv_pcmcia_add_one); |
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} |
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MODULE_LICENSE("GPL");
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