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200 lines
4.4 KiB
200 lines
4.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/drivers/pcmcia/pxa2xx_trizeps4.c |
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* |
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* TRIZEPS PCMCIA specific routines. |
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* |
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* Author: Jürgen Schindele |
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* Created: 20 02, 2006 |
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* Copyright: Jürgen Schindele |
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*/ |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/gpio.h> |
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#include <linux/interrupt.h> |
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#include <linux/platform_device.h> |
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#include <asm/mach-types.h> |
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#include <asm/irq.h> |
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#include <mach/pxa2xx-regs.h> |
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#include <mach/trizeps4.h> |
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#include "soc_common.h" |
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extern void board_pcmcia_power(int power); |
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static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
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{ |
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/* we dont have voltage/card/ready detection |
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* so we dont need interrupts for it |
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*/ |
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switch (skt->nr) { |
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case 0: |
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skt->stat[SOC_STAT_CD].gpio = GPIO_PCD; |
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skt->stat[SOC_STAT_CD].name = "cs0_cd"; |
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skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY; |
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skt->stat[SOC_STAT_RDY].name = "cs0_rdy"; |
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break; |
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default: |
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break; |
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} |
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/* release the reset of this card */ |
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pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq); |
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return 0; |
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} |
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static unsigned long trizeps_pcmcia_status[2]; |
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static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
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struct pcmcia_state *state) |
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{ |
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unsigned short status = 0, change; |
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status = CFSR_readw(); |
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change = (status ^ trizeps_pcmcia_status[skt->nr]) & |
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ConXS_CFSR_BVD_MASK; |
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if (change) { |
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trizeps_pcmcia_status[skt->nr] = status; |
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if (status & ConXS_CFSR_BVD1) { |
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/* enable_irq empty */ |
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} else { |
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/* disable_irq empty */ |
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} |
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} |
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switch (skt->nr) { |
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case 0: |
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/* just fill in fix states */ |
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state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0; |
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state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0; |
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state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1; |
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state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1; |
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break; |
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#ifndef CONFIG_MACH_TRIZEPS_CONXS |
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/* on ConXS we only have one slot. Second is inactive */ |
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case 1: |
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state->detect = 0; |
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state->ready = 0; |
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state->bvd1 = 0; |
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state->bvd2 = 0; |
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state->vs_3v = 0; |
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state->vs_Xv = 0; |
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break; |
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#endif |
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} |
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} |
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static int trizeps_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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int ret = 0; |
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unsigned short power = 0; |
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/* we do nothing here just check a bit */ |
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switch (state->Vcc) { |
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case 0: power &= 0xfc; break; |
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case 33: power |= ConXS_BCR_S0_VCC_3V3; break; |
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case 50: |
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pr_err("%s(): Vcc 5V not supported in socket\n", __func__); |
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break; |
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default: |
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pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc); |
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ret = -1; |
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} |
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switch (state->Vpp) { |
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case 0: power &= 0xf3; break; |
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case 33: power |= ConXS_BCR_S0_VPP_3V3; break; |
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case 120: |
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pr_err("%s(): Vpp 12V not supported in socket\n", __func__); |
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break; |
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default: |
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if (state->Vpp != state->Vcc) { |
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pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp); |
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ret = -1; |
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} |
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} |
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switch (skt->nr) { |
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case 0: /* we only have 3.3V */ |
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board_pcmcia_power(power); |
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break; |
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#ifndef CONFIG_MACH_TRIZEPS_CONXS |
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/* on ConXS we only have one slot. Second is inactive */ |
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case 1: |
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#endif |
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default: |
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break; |
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} |
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return ret; |
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} |
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static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt) |
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{ |
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/* default is on */ |
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board_pcmcia_power(0x9); |
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} |
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static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) |
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{ |
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board_pcmcia_power(0x0); |
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} |
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static struct pcmcia_low_level trizeps_pcmcia_ops = { |
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.owner = THIS_MODULE, |
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.hw_init = trizeps_pcmcia_hw_init, |
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.socket_state = trizeps_pcmcia_socket_state, |
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.configure_socket = trizeps_pcmcia_configure_socket, |
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.socket_init = trizeps_pcmcia_socket_init, |
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.socket_suspend = trizeps_pcmcia_socket_suspend, |
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#ifdef CONFIG_MACH_TRIZEPS_CONXS |
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.nr = 1, |
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#else |
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.nr = 2, |
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#endif |
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.first = 0, |
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}; |
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static struct platform_device *trizeps_pcmcia_device; |
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static int __init trizeps_pcmcia_init(void) |
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{ |
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int ret; |
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if (!machine_is_trizeps4() && !machine_is_trizeps4wl()) |
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return -ENODEV; |
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trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
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if (!trizeps_pcmcia_device) |
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return -ENOMEM; |
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ret = platform_device_add_data(trizeps_pcmcia_device, |
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&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops)); |
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if (ret == 0) |
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ret = platform_device_add(trizeps_pcmcia_device); |
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if (ret) |
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platform_device_put(trizeps_pcmcia_device); |
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return ret; |
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} |
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static void __exit trizeps_pcmcia_exit(void) |
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{ |
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platform_device_unregister(trizeps_pcmcia_device); |
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} |
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fs_initcall(trizeps_pcmcia_init); |
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module_exit(trizeps_pcmcia_exit); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Juergen Schindele"); |
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MODULE_ALIAS("platform:pxa2xx-pcmcia");
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