1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Sharp SL-C7xx Series PCMCIA routines
4 *
5 * Copyright (c) 2004-2005 Richard Purdie
6 *
7 * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
8 */
9
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/interrupt.h>
15 #include <linux/platform_device.h>
16
17 #include <asm/mach-types.h>
18 #include <mach/hardware.h>
19 #include <asm/irq.h>
20 #include <asm/hardware/scoop.h>
21
22 #include "soc_common.h"
23
24 #define NO_KEEP_VS 0x0001
25 #define SCOOP_DEV platform_scoop_config->devs
26
sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket * skt)27 static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
28 {
29 struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];
30
31 reset_scoop(scoopdev->dev);
32
33 /* Shared power controls need to be handled carefully */
34 if (platform_scoop_config->power_ctrl)
35 platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
36 else
37 write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);
38
39 scoopdev->keep_vs = NO_KEEP_VS;
40 scoopdev->keep_rd = 0;
41 }
42
sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket * skt)43 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
44 {
45 if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
46 skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq;
47 skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str;
48 }
49
50 skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq;
51
52 return 0;
53 }
54
sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)55 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
56 struct pcmcia_state *state)
57 {
58 unsigned short cpr, csr;
59 struct device *scoop = SCOOP_DEV[skt->nr].dev;
60
61 cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);
62
63 write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
64 write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
65 write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
66 csr = read_scoop_reg(scoop, SCOOP_CSR);
67 if (csr & 0x0004) {
68 /* card eject */
69 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
70 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
71 }
72 else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
73 /* keep vs1,vs2 */
74 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
75 csr |= SCOOP_DEV[skt->nr].keep_vs;
76 }
77 else if (cpr & 0x0003) {
78 /* power on */
79 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
80 SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
81 }
82 else {
83 /* card detect */
84 if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
85 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
86 } else {
87 write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
88 }
89 }
90
91 state->detect = (csr & 0x0004) ? 0 : 1;
92 state->ready = (csr & 0x0002) ? 1 : 0;
93 state->bvd1 = (csr & 0x0010) ? 1 : 0;
94 state->bvd2 = (csr & 0x0020) ? 1 : 0;
95 state->wrprot = (csr & 0x0008) ? 1 : 0;
96 state->vs_3v = (csr & 0x0040) ? 0 : 1;
97 state->vs_Xv = (csr & 0x0080) ? 0 : 1;
98
99 if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
100 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
101 }
102 }
103
104
sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)105 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
106 const socket_state_t *state)
107 {
108 unsigned long flags;
109 struct device *scoop = SCOOP_DEV[skt->nr].dev;
110
111 unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
112
113 switch (state->Vcc) {
114 case 0: break;
115 case 33: break;
116 case 50: break;
117 default:
118 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
119 return -1;
120 }
121
122 if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
123 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
124 return -1;
125 }
126
127 local_irq_save(flags);
128
129 nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
130 ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
131 nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
132 nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;
133
134 if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
135 ncpr |= (state->Vcc == 33) ? 0x0002 :
136 (state->Vcc == 50) ? 0x0002 : 0;
137 } else {
138 ncpr |= (state->Vcc == 33) ? 0x0001 :
139 (state->Vcc == 50) ? 0x0002 : 0;
140 }
141 nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
142 ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
143 nccr |= (state->flags&SS_RESET)? 0x0080: 0;
144 nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)|
145 ((skt->status&SS_READY) ? 0x0002 : 0)|
146 ((skt->status&SS_BATDEAD)? 0x0010 : 0)|
147 ((skt->status&SS_BATWARN)? 0x0020 : 0)|
148 ((skt->status&SS_STSCHG) ? 0x0010 : 0)|
149 ((skt->status&SS_WRPROT) ? 0x0008 : 0);
150
151 if (!(ncpr & 0x0003)) {
152 SCOOP_DEV[skt->nr].keep_rd = 0;
153 } else if (!SCOOP_DEV[skt->nr].keep_rd) {
154 if (nccr & 0x0080)
155 SCOOP_DEV[skt->nr].keep_rd = 1;
156 else
157 nccr |= 0x0080;
158 }
159
160 if (mcr != nmcr)
161 write_scoop_reg(scoop, SCOOP_MCR, nmcr);
162 if (cpr != ncpr) {
163 if (platform_scoop_config->power_ctrl)
164 platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
165 else
166 write_scoop_reg(scoop, SCOOP_CPR, ncpr);
167 }
168 if (ccr != nccr)
169 write_scoop_reg(scoop, SCOOP_CCR, nccr);
170 if (imr != nimr)
171 write_scoop_reg(scoop, SCOOP_IMR, nimr);
172
173 local_irq_restore(flags);
174
175 return 0;
176 }
177
sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket * skt)178 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
179 {
180 sharpsl_pcmcia_init_reset(skt);
181
182 /* Enable interrupt */
183 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
184 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
185 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
186 }
187
sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket * skt)188 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
189 {
190 sharpsl_pcmcia_init_reset(skt);
191 }
192
193 static struct pcmcia_low_level sharpsl_pcmcia_ops = {
194 .owner = THIS_MODULE,
195 .hw_init = sharpsl_pcmcia_hw_init,
196 .socket_state = sharpsl_pcmcia_socket_state,
197 .configure_socket = sharpsl_pcmcia_configure_socket,
198 .socket_init = sharpsl_pcmcia_socket_init,
199 .socket_suspend = sharpsl_pcmcia_socket_suspend,
200 .first = 0,
201 .nr = 0,
202 };
203
204 #ifdef CONFIG_SA1100_COLLIE
205 #include "sa11xx_base.h"
206
pcmcia_collie_init(struct device * dev)207 int pcmcia_collie_init(struct device *dev)
208 {
209 int ret = -ENODEV;
210
211 if (machine_is_collie())
212 ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);
213
214 return ret;
215 }
216
217 #else
218
219 static struct platform_device *sharpsl_pcmcia_device;
220
sharpsl_pcmcia_init(void)221 static int __init sharpsl_pcmcia_init(void)
222 {
223 int ret;
224
225 if (!platform_scoop_config)
226 return -ENODEV;
227
228 sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
229 sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
230
231 if (!sharpsl_pcmcia_device)
232 return -ENOMEM;
233
234 ret = platform_device_add_data(sharpsl_pcmcia_device,
235 &sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
236 if (ret == 0) {
237 sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
238 ret = platform_device_add(sharpsl_pcmcia_device);
239 }
240
241 if (ret)
242 platform_device_put(sharpsl_pcmcia_device);
243
244 return ret;
245 }
246
sharpsl_pcmcia_exit(void)247 static void __exit sharpsl_pcmcia_exit(void)
248 {
249 platform_device_unregister(sharpsl_pcmcia_device);
250 }
251
252 fs_initcall(sharpsl_pcmcia_init);
253 module_exit(sharpsl_pcmcia_exit);
254 #endif
255
256 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
257 MODULE_LICENSE("GPL");
258 MODULE_ALIAS("platform:pxa2xx-pcmcia");
259