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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> |
19 | #include <linux/platform_device.h> |
20 | |
21 | #include <asm/mach-types.h> |
22 | #include <mach/hardware.h> |
23 | #include <asm/irq.h> |
24 | #include <asm/hardware/scoop.h> |
25 | |
26 | #include "soc_common.h" |
27 | |
28 | #define NO_KEEP_VS 0x0001 |
29 | #define SCOOP_DEV platform_scoop_config->devs |
30 | |
31 | static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt) |
32 | { |
33 | struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr]; |
34 | |
35 | reset_scoop(scoopdev->dev); |
36 | |
37 | /* Shared power controls need to be handled carefully */ |
38 | if (platform_scoop_config->power_ctrl) |
39 | platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr); |
40 | else |
41 | write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000); |
42 | |
43 | scoopdev->keep_vs = NO_KEEP_VS; |
44 | scoopdev->keep_rd = 0; |
45 | } |
46 | |
47 | static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
48 | { |
49 | if (SCOOP_DEV[skt->nr].cd_irq >= 0) { |
50 | skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq; |
51 | skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str; |
52 | } |
53 | |
54 | skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq; |
55 | |
56 | return 0; |
57 | } |
58 | |
59 | static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
60 | struct pcmcia_state *state) |
61 | { |
62 | unsigned short cpr, csr; |
63 | struct device *scoop = SCOOP_DEV[skt->nr].dev; |
64 | |
65 | cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR); |
66 | |
67 | write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); |
68 | write_scoop_reg(scoop, SCOOP_ISR, 0x0000); |
69 | write_scoop_reg(scoop, SCOOP_IRM, 0x0000); |
70 | csr = read_scoop_reg(scoop, SCOOP_CSR); |
71 | if (csr & 0x0004) { |
72 | /* card eject */ |
73 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
74 | SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; |
75 | } |
76 | else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) { |
77 | /* keep vs1,vs2 */ |
78 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
79 | csr |= SCOOP_DEV[skt->nr].keep_vs; |
80 | } |
81 | else if (cpr & 0x0003) { |
82 | /* power on */ |
83 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
84 | SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0); |
85 | } |
86 | else { |
87 | /* card detect */ |
88 | if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) { |
89 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
90 | } else { |
91 | write_scoop_reg(scoop, SCOOP_CDR, 0x0002); |
92 | } |
93 | } |
94 | |
95 | state->detect = (csr & 0x0004) ? 0 : 1; |
96 | state->ready = (csr & 0x0002) ? 1 : 0; |
97 | state->bvd1 = (csr & 0x0010) ? 1 : 0; |
98 | state->bvd2 = (csr & 0x0020) ? 1 : 0; |
99 | state->wrprot = (csr & 0x0008) ? 1 : 0; |
100 | state->vs_3v = (csr & 0x0040) ? 0 : 1; |
101 | state->vs_Xv = (csr & 0x0080) ? 0 : 1; |
102 | |
103 | if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { |
104 | printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); |
105 | } |
106 | } |
107 | |
108 | |
109 | static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
110 | const socket_state_t *state) |
111 | { |
112 | unsigned long flags; |
113 | struct device *scoop = SCOOP_DEV[skt->nr].dev; |
114 | |
115 | unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; |
116 | |
117 | switch (state->Vcc) { |
118 | case 0: break; |
119 | case 33: break; |
120 | case 50: break; |
121 | default: |
122 | printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); |
123 | return -1; |
124 | } |
125 | |
126 | if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { |
127 | printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); |
128 | return -1; |
129 | } |
130 | |
131 | local_irq_save(flags); |
132 | |
133 | nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; |
134 | ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; |
135 | nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; |
136 | nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; |
137 | |
138 | if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) { |
139 | ncpr |= (state->Vcc == 33) ? 0x0002 : |
140 | (state->Vcc == 50) ? 0x0002 : 0; |
141 | } else { |
142 | ncpr |= (state->Vcc == 33) ? 0x0001 : |
143 | (state->Vcc == 50) ? 0x0002 : 0; |
144 | } |
145 | nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; |
146 | ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; |
147 | nccr |= (state->flags&SS_RESET)? 0x0080: 0; |
148 | nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| |
149 | ((skt->status&SS_READY) ? 0x0002 : 0)| |
150 | ((skt->status&SS_BATDEAD)? 0x0010 : 0)| |
151 | ((skt->status&SS_BATWARN)? 0x0020 : 0)| |
152 | ((skt->status&SS_STSCHG) ? 0x0010 : 0)| |
153 | ((skt->status&SS_WRPROT) ? 0x0008 : 0); |
154 | |
155 | if (!(ncpr & 0x0003)) { |
156 | SCOOP_DEV[skt->nr].keep_rd = 0; |
157 | } else if (!SCOOP_DEV[skt->nr].keep_rd) { |
158 | if (nccr & 0x0080) |
159 | SCOOP_DEV[skt->nr].keep_rd = 1; |
160 | else |
161 | nccr |= 0x0080; |
162 | } |
163 | |
164 | if (mcr != nmcr) |
165 | write_scoop_reg(scoop, SCOOP_MCR, nmcr); |
166 | if (cpr != ncpr) { |
167 | if (platform_scoop_config->power_ctrl) |
168 | platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr); |
169 | else |
170 | write_scoop_reg(scoop, SCOOP_CPR, ncpr); |
171 | } |
172 | if (ccr != nccr) |
173 | write_scoop_reg(scoop, SCOOP_CCR, nccr); |
174 | if (imr != nimr) |
175 | write_scoop_reg(scoop, SCOOP_IMR, nimr); |
176 | |
177 | local_irq_restore(flags); |
178 | |
179 | return 0; |
180 | } |
181 | |
182 | static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) |
183 | { |
184 | sharpsl_pcmcia_init_reset(skt); |
185 | |
186 | /* Enable interrupt */ |
187 | write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0); |
188 | write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101); |
189 | SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; |
190 | } |
191 | |
192 | static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) |
193 | { |
194 | sharpsl_pcmcia_init_reset(skt); |
195 | } |
196 | |
197 | static struct pcmcia_low_level sharpsl_pcmcia_ops __initdata = { |
198 | .owner = THIS_MODULE, |
199 | .hw_init = sharpsl_pcmcia_hw_init, |
200 | .socket_state = sharpsl_pcmcia_socket_state, |
201 | .configure_socket = sharpsl_pcmcia_configure_socket, |
202 | .socket_init = sharpsl_pcmcia_socket_init, |
203 | .socket_suspend = sharpsl_pcmcia_socket_suspend, |
204 | .first = 0, |
205 | .nr = 0, |
206 | }; |
207 | |
208 | #ifdef CONFIG_SA1100_COLLIE |
209 | #include "sa11xx_base.h" |
210 | |
211 | int __devinit pcmcia_collie_init(struct device *dev) |
212 | { |
213 | int ret = -ENODEV; |
214 | |
215 | if (machine_is_collie()) |
216 | ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1); |
217 | |
218 | return ret; |
219 | } |
220 | |
221 | #else |
222 | |
223 | static struct platform_device *sharpsl_pcmcia_device; |
224 | |
225 | static int __init sharpsl_pcmcia_init(void) |
226 | { |
227 | int ret; |
228 | |
229 | if (!platform_scoop_config) |
230 | return -ENODEV; |
231 | |
232 | sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs; |
233 | sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
234 | |
235 | if (!sharpsl_pcmcia_device) |
236 | return -ENOMEM; |
237 | |
238 | ret = platform_device_add_data(sharpsl_pcmcia_device, |
239 | &sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops)); |
240 | if (ret == 0) { |
241 | sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev; |
242 | ret = platform_device_add(sharpsl_pcmcia_device); |
243 | } |
244 | |
245 | if (ret) |
246 | platform_device_put(sharpsl_pcmcia_device); |
247 | |
248 | return ret; |
249 | } |
250 | |
251 | static void __exit sharpsl_pcmcia_exit(void) |
252 | { |
253 | platform_device_unregister(sharpsl_pcmcia_device); |
254 | } |
255 | |
256 | fs_initcall(sharpsl_pcmcia_init); |
257 | module_exit(sharpsl_pcmcia_exit); |
258 | #endif |
259 | |
260 | MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); |
261 | MODULE_LICENSE("GPL"); |
262 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); |
263 |
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