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1da177e4 LT |
1 | /* |
2 | * Sharp SL-C7xx Series PCMCIA routines | |
3 | * | |
4 | * Copyright (c) 2004-2005 Richard Purdie | |
5 | * | |
6 | * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/interrupt.h> | |
d052d1be | 19 | #include <linux/platform_device.h> |
1da177e4 LT |
20 | |
21 | #include <asm/hardware.h> | |
22 | #include <asm/irq.h> | |
1da177e4 | 23 | #include <asm/hardware/scoop.h> |
1da177e4 LT |
24 | #include <asm/arch/pxa-regs.h> |
25 | ||
26 | #include "soc_common.h" | |
27 | ||
28 | #define NO_KEEP_VS 0x0001 | |
29 | ||
0ce7625f | 30 | static void sharpsl_pcmcia_init_reset(struct scoop_pcmcia_dev *scoopdev) |
1da177e4 | 31 | { |
0ce7625f RP |
32 | reset_scoop(scoopdev->dev); |
33 | scoopdev->keep_vs = NO_KEEP_VS; | |
34 | scoopdev->keep_rd = 0; | |
1da177e4 LT |
35 | } |
36 | ||
37 | static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) | |
38 | { | |
39 | int ret; | |
40 | ||
41 | /* | |
42 | * Setup default state of GPIO outputs | |
43 | * before we enable them as outputs. | |
44 | */ | |
45 | GPSR(GPIO48_nPOE) = | |
46 | GPIO_bit(GPIO48_nPOE) | | |
47 | GPIO_bit(GPIO49_nPWE) | | |
48 | GPIO_bit(GPIO50_nPIOR) | | |
49 | GPIO_bit(GPIO51_nPIOW) | | |
50 | GPIO_bit(GPIO52_nPCE_1) | | |
51 | GPIO_bit(GPIO53_nPCE_2); | |
52 | ||
53 | pxa_gpio_mode(GPIO48_nPOE_MD); | |
54 | pxa_gpio_mode(GPIO49_nPWE_MD); | |
55 | pxa_gpio_mode(GPIO50_nPIOR_MD); | |
56 | pxa_gpio_mode(GPIO51_nPIOW_MD); | |
57 | pxa_gpio_mode(GPIO52_nPCE_1_MD); | |
58 | pxa_gpio_mode(GPIO53_nPCE_2_MD); | |
59 | pxa_gpio_mode(GPIO54_pSKTSEL_MD); | |
60 | pxa_gpio_mode(GPIO55_nPREG_MD); | |
61 | pxa_gpio_mode(GPIO56_nPWAIT_MD); | |
62 | pxa_gpio_mode(GPIO57_nIOIS16_MD); | |
63 | ||
64 | /* Register interrupts */ | |
0ce7625f RP |
65 | if (scoop_devs[skt->nr].cd_irq >= 0) { |
66 | struct pcmcia_irqs cd_irq; | |
67 | ||
68 | cd_irq.sock = skt->nr; | |
69 | cd_irq.irq = scoop_devs[skt->nr].cd_irq; | |
70 | cd_irq.str = scoop_devs[skt->nr].cd_irq_str; | |
71 | ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1); | |
72 | ||
73 | if (ret) { | |
74 | printk(KERN_ERR "Request for Compact Flash IRQ failed\n"); | |
75 | return ret; | |
76 | } | |
1da177e4 LT |
77 | } |
78 | ||
0ce7625f | 79 | skt->irq = scoop_devs[skt->nr].irq; |
1da177e4 LT |
80 | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | |
85 | { | |
0ce7625f RP |
86 | if (scoop_devs[skt->nr].cd_irq >= 0) { |
87 | struct pcmcia_irqs cd_irq; | |
1da177e4 | 88 | |
0ce7625f RP |
89 | cd_irq.sock = skt->nr; |
90 | cd_irq.irq = scoop_devs[skt->nr].cd_irq; | |
91 | cd_irq.str = scoop_devs[skt->nr].cd_irq_str; | |
92 | soc_pcmcia_free_irqs(skt, &cd_irq, 1); | |
93 | } | |
1da177e4 LT |
94 | } |
95 | ||
96 | ||
97 | static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
98 | struct pcmcia_state *state) | |
99 | { | |
100 | unsigned short cpr, csr; | |
0ce7625f | 101 | struct device *scoop = scoop_devs[skt->nr].dev; |
1da177e4 | 102 | |
0ce7625f | 103 | cpr = read_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_CPR); |
1da177e4 | 104 | |
0ce7625f RP |
105 | write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); |
106 | write_scoop_reg(scoop, SCOOP_ISR, 0x0000); | |
107 | write_scoop_reg(scoop, SCOOP_IRM, 0x0000); | |
108 | csr = read_scoop_reg(scoop, SCOOP_CSR); | |
1da177e4 LT |
109 | if (csr & 0x0004) { |
110 | /* card eject */ | |
0ce7625f RP |
111 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
112 | scoop_devs[skt->nr].keep_vs = NO_KEEP_VS; | |
1da177e4 | 113 | } |
0ce7625f | 114 | else if (!(scoop_devs[skt->nr].keep_vs & NO_KEEP_VS)) { |
1da177e4 | 115 | /* keep vs1,vs2 */ |
0ce7625f RP |
116 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
117 | csr |= scoop_devs[skt->nr].keep_vs; | |
1da177e4 LT |
118 | } |
119 | else if (cpr & 0x0003) { | |
120 | /* power on */ | |
0ce7625f RP |
121 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
122 | scoop_devs[skt->nr].keep_vs = (csr & 0x00C0); | |
1da177e4 LT |
123 | } |
124 | else { | |
125 | /* card detect */ | |
0ce7625f | 126 | write_scoop_reg(scoop, SCOOP_CDR, 0x0002); |
1da177e4 LT |
127 | } |
128 | ||
129 | state->detect = (csr & 0x0004) ? 0 : 1; | |
130 | state->ready = (csr & 0x0002) ? 1 : 0; | |
131 | state->bvd1 = (csr & 0x0010) ? 1 : 0; | |
132 | state->bvd2 = (csr & 0x0020) ? 1 : 0; | |
133 | state->wrprot = (csr & 0x0008) ? 1 : 0; | |
134 | state->vs_3v = (csr & 0x0040) ? 0 : 1; | |
135 | state->vs_Xv = (csr & 0x0080) ? 0 : 1; | |
136 | ||
137 | if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { | |
138 | printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); | |
139 | } | |
140 | ||
141 | } | |
142 | ||
143 | ||
144 | static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | |
145 | const socket_state_t *state) | |
146 | { | |
147 | unsigned long flags; | |
0ce7625f | 148 | struct device *scoop = scoop_devs[skt->nr].dev; |
1da177e4 LT |
149 | |
150 | unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; | |
151 | ||
152 | switch (state->Vcc) { | |
153 | case 0: break; | |
154 | case 33: break; | |
155 | case 50: break; | |
156 | default: | |
157 | printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); | |
158 | return -1; | |
159 | } | |
160 | ||
161 | if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { | |
162 | printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); | |
163 | return -1; | |
164 | } | |
165 | ||
166 | local_irq_save(flags); | |
167 | ||
0ce7625f RP |
168 | nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; |
169 | ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; | |
170 | nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; | |
171 | nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; | |
1da177e4 LT |
172 | |
173 | ncpr |= (state->Vcc == 33) ? 0x0001 : | |
174 | (state->Vcc == 50) ? 0x0002 : 0; | |
175 | nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; | |
176 | ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; | |
177 | nccr |= (state->flags&SS_RESET)? 0x0080: 0; | |
178 | nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| | |
179 | ((skt->status&SS_READY) ? 0x0002 : 0)| | |
180 | ((skt->status&SS_BATDEAD)? 0x0010 : 0)| | |
181 | ((skt->status&SS_BATWARN)? 0x0020 : 0)| | |
182 | ((skt->status&SS_STSCHG) ? 0x0010 : 0)| | |
183 | ((skt->status&SS_WRPROT) ? 0x0008 : 0); | |
184 | ||
185 | if (!(ncpr & 0x0003)) { | |
0ce7625f RP |
186 | scoop_devs[skt->nr].keep_rd = 0; |
187 | } else if (!scoop_devs[skt->nr].keep_rd) { | |
1da177e4 | 188 | if (nccr & 0x0080) |
0ce7625f | 189 | scoop_devs[skt->nr].keep_rd = 1; |
1da177e4 LT |
190 | else |
191 | nccr |= 0x0080; | |
192 | } | |
193 | ||
194 | if (mcr != nmcr) | |
0ce7625f | 195 | write_scoop_reg(scoop, SCOOP_MCR, nmcr); |
1da177e4 | 196 | if (cpr != ncpr) |
0ce7625f | 197 | write_scoop_reg(scoop, SCOOP_CPR, ncpr); |
1da177e4 | 198 | if (ccr != nccr) |
0ce7625f | 199 | write_scoop_reg(scoop, SCOOP_CCR, nccr); |
1da177e4 | 200 | if (imr != nimr) |
0ce7625f | 201 | write_scoop_reg(scoop, SCOOP_IMR, nimr); |
1da177e4 LT |
202 | |
203 | local_irq_restore(flags); | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) | |
209 | { | |
0ce7625f RP |
210 | sharpsl_pcmcia_init_reset(&scoop_devs[skt->nr]); |
211 | ||
212 | /* Enable interrupt */ | |
213 | write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_IMR, 0x00C0); | |
214 | write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_MCR, 0x0101); | |
215 | scoop_devs[skt->nr].keep_vs = NO_KEEP_VS; | |
1da177e4 LT |
216 | } |
217 | ||
218 | static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) | |
219 | { | |
0ce7625f RP |
220 | /* CF_BUS_OFF */ |
221 | sharpsl_pcmcia_init_reset(&scoop_devs[skt->nr]); | |
1da177e4 LT |
222 | } |
223 | ||
224 | static struct pcmcia_low_level sharpsl_pcmcia_ops = { | |
225 | .owner = THIS_MODULE, | |
226 | .hw_init = sharpsl_pcmcia_hw_init, | |
227 | .hw_shutdown = sharpsl_pcmcia_hw_shutdown, | |
228 | .socket_state = sharpsl_pcmcia_socket_state, | |
229 | .configure_socket = sharpsl_pcmcia_configure_socket, | |
230 | .socket_init = sharpsl_pcmcia_socket_init, | |
231 | .socket_suspend = sharpsl_pcmcia_socket_suspend, | |
232 | .first = 0, | |
0ce7625f | 233 | .nr = 0, |
1da177e4 LT |
234 | }; |
235 | ||
236 | static struct platform_device *sharpsl_pcmcia_device; | |
237 | ||
238 | static int __init sharpsl_pcmcia_init(void) | |
239 | { | |
240 | int ret; | |
241 | ||
0ce7625f | 242 | sharpsl_pcmcia_ops.nr=scoop_num; |
1da177e4 LT |
243 | sharpsl_pcmcia_device = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL); |
244 | if (!sharpsl_pcmcia_device) | |
245 | return -ENOMEM; | |
0ce7625f | 246 | |
1da177e4 LT |
247 | memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device)); |
248 | sharpsl_pcmcia_device->name = "pxa2xx-pcmcia"; | |
249 | sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops; | |
0ce7625f | 250 | sharpsl_pcmcia_device->dev.parent=scoop_devs[0].dev; |
1da177e4 LT |
251 | |
252 | ret = platform_device_register(sharpsl_pcmcia_device); | |
253 | if (ret) | |
254 | kfree(sharpsl_pcmcia_device); | |
255 | ||
256 | return ret; | |
257 | } | |
258 | ||
259 | static void __exit sharpsl_pcmcia_exit(void) | |
260 | { | |
261 | /* | |
262 | * This call is supposed to free our sharpsl_pcmcia_device. | |
263 | * Unfortunately platform_device don't have a free method, and | |
264 | * we can't assume it's free of any reference at this point so we | |
265 | * can't free it either. | |
266 | */ | |
267 | platform_device_unregister(sharpsl_pcmcia_device); | |
268 | } | |
269 | ||
f36598ae | 270 | fs_initcall(sharpsl_pcmcia_init); |
1da177e4 LT |
271 | module_exit(sharpsl_pcmcia_exit); |
272 | ||
273 | MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); | |
274 | MODULE_LICENSE("GPL"); |