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| 1 | /* |
| 2 | * linux/drivers/pcmcia/pxa2xx_mainstone.c |
| 3 | * |
| 4 | * Mainstone PCMCIA specific routines. |
| 5 | * |
| 6 | * Created: May 12, 2004 |
| 7 | * Author: Nicolas Pitre |
| 8 | * Copyright: MontaVista Software Inc. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/errno.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | |
| 22 | #include <pcmcia/ss.h> |
| 23 | |
| 24 | #include <asm/mach-types.h> |
| 25 | #include <asm/irq.h> |
| 26 | |
| 27 | #include <mach/pxa2xx-regs.h> |
| 28 | #include <mach/mainstone.h> |
| 29 | |
| 30 | #include "soc_common.h" |
| 31 | |
| 32 | |
| 33 | static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
| 34 | { |
| 35 | /* |
| 36 | * Setup default state of GPIO outputs |
| 37 | * before we enable them as outputs. |
| 38 | */ |
| 39 | if (skt->nr == 0) { |
| 40 | skt->socket.pci_irq = MAINSTONE_S0_IRQ; |
| 41 | skt->stat[SOC_STAT_CD].irq = MAINSTONE_S0_CD_IRQ; |
| 42 | skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD"; |
| 43 | skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S0_STSCHG_IRQ; |
| 44 | skt->stat[SOC_STAT_BVD1].name = "PCMCIA0 STSCHG"; |
| 45 | } else { |
| 46 | skt->socket.pci_irq = MAINSTONE_S1_IRQ; |
| 47 | skt->stat[SOC_STAT_CD].irq = MAINSTONE_S1_CD_IRQ; |
| 48 | skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD"; |
| 49 | skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S1_STSCHG_IRQ; |
| 50 | skt->stat[SOC_STAT_BVD1].name = "PCMCIA1 STSCHG"; |
| 51 | } |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | static unsigned long mst_pcmcia_status[2]; |
| 56 | |
| 57 | static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
| 58 | struct pcmcia_state *state) |
| 59 | { |
| 60 | unsigned long status, flip; |
| 61 | |
| 62 | status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1; |
| 63 | flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1; |
| 64 | |
| 65 | /* |
| 66 | * Workaround for STSCHG which can't be deasserted: |
| 67 | * We therefore disable/enable corresponding IRQs |
| 68 | * as needed to avoid IRQ locks. |
| 69 | */ |
| 70 | if (flip) { |
| 71 | mst_pcmcia_status[skt->nr] = status; |
| 72 | if (status & MST_PCMCIA_nSTSCHG_BVD1) |
| 73 | enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ |
| 74 | : MAINSTONE_S1_STSCHG_IRQ ); |
| 75 | else |
| 76 | disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ |
| 77 | : MAINSTONE_S1_STSCHG_IRQ ); |
| 78 | } |
| 79 | |
| 80 | state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1; |
| 81 | state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0; |
| 82 | state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0; |
| 83 | state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0; |
| 84 | state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1; |
| 85 | state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1; |
| 86 | } |
| 87 | |
| 88 | static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
| 89 | const socket_state_t *state) |
| 90 | { |
| 91 | unsigned long power = 0; |
| 92 | int ret = 0; |
| 93 | |
| 94 | switch (state->Vcc) { |
| 95 | case 0: power |= MST_PCMCIA_PWR_VCC_0; break; |
| 96 | case 33: power |= MST_PCMCIA_PWR_VCC_33; break; |
| 97 | case 50: power |= MST_PCMCIA_PWR_VCC_50; break; |
| 98 | default: |
| 99 | printk(KERN_ERR "%s(): bad Vcc %u\n", |
| 100 | __func__, state->Vcc); |
| 101 | ret = -1; |
| 102 | } |
| 103 | |
| 104 | switch (state->Vpp) { |
| 105 | case 0: power |= MST_PCMCIA_PWR_VPP_0; break; |
| 106 | case 120: power |= MST_PCMCIA_PWR_VPP_120; break; |
| 107 | default: |
| 108 | if(state->Vpp == state->Vcc) { |
| 109 | power |= MST_PCMCIA_PWR_VPP_VCC; |
| 110 | } else { |
| 111 | printk(KERN_ERR "%s(): bad Vpp %u\n", |
| 112 | __func__, state->Vpp); |
| 113 | ret = -1; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | if (state->flags & SS_RESET) |
| 118 | power |= MST_PCMCIA_RESET; |
| 119 | |
| 120 | switch (skt->nr) { |
| 121 | case 0: MST_PCMCIA0 = power; break; |
| 122 | case 1: MST_PCMCIA1 = power; break; |
| 123 | default: ret = -1; |
| 124 | } |
| 125 | |
| 126 | return ret; |
| 127 | } |
| 128 | |
| 129 | static struct pcmcia_low_level mst_pcmcia_ops __initdata = { |
| 130 | .owner = THIS_MODULE, |
| 131 | .hw_init = mst_pcmcia_hw_init, |
| 132 | .socket_state = mst_pcmcia_socket_state, |
| 133 | .configure_socket = mst_pcmcia_configure_socket, |
| 134 | .nr = 2, |
| 135 | }; |
| 136 | |
| 137 | static struct platform_device *mst_pcmcia_device; |
| 138 | |
| 139 | static int __init mst_pcmcia_init(void) |
| 140 | { |
| 141 | int ret; |
| 142 | |
| 143 | if (!machine_is_mainstone()) |
| 144 | return -ENODEV; |
| 145 | |
| 146 | mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
| 147 | if (!mst_pcmcia_device) |
| 148 | return -ENOMEM; |
| 149 | |
| 150 | ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops, |
| 151 | sizeof(mst_pcmcia_ops)); |
| 152 | if (ret == 0) |
| 153 | ret = platform_device_add(mst_pcmcia_device); |
| 154 | |
| 155 | if (ret) |
| 156 | platform_device_put(mst_pcmcia_device); |
| 157 | |
| 158 | return ret; |
| 159 | } |
| 160 | |
| 161 | static void __exit mst_pcmcia_exit(void) |
| 162 | { |
| 163 | platform_device_unregister(mst_pcmcia_device); |
| 164 | } |
| 165 | |
| 166 | fs_initcall(mst_pcmcia_init); |
| 167 | module_exit(mst_pcmcia_exit); |
| 168 | |
| 169 | MODULE_LICENSE("GPL"); |
| 170 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); |
| 171 |
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