1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/pcmcia/sa1111_generic.c
4 *
5 * We implement the generic parts of a SA1111 PCMCIA driver. This
6 * basically means we handle everything except controlling the
7 * power. Power is machine specific...
8 */
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/ioport.h>
12 #include <linux/device.h>
13 #include <linux/interrupt.h>
14 #include <linux/init.h>
15 #include <linux/io.h>
16 #include <linux/slab.h>
17
18 #include <pcmcia/ss.h>
19
20 #include <mach/hardware.h>
21 #include <asm/hardware/sa1111.h>
22 #include <asm/mach-types.h>
23 #include <asm/irq.h>
24
25 #include "sa1111_generic.h"
26
27 /*
28 * These are offsets from the above base.
29 */
30 #define PCCR 0x0000
31 #define PCSSR 0x0004
32 #define PCSR 0x0008
33
34 #define PCSR_S0_READY (1<<0)
35 #define PCSR_S1_READY (1<<1)
36 #define PCSR_S0_DETECT (1<<2)
37 #define PCSR_S1_DETECT (1<<3)
38 #define PCSR_S0_VS1 (1<<4)
39 #define PCSR_S0_VS2 (1<<5)
40 #define PCSR_S1_VS1 (1<<6)
41 #define PCSR_S1_VS2 (1<<7)
42 #define PCSR_S0_WP (1<<8)
43 #define PCSR_S1_WP (1<<9)
44 #define PCSR_S0_BVD1 (1<<10)
45 #define PCSR_S0_BVD2 (1<<11)
46 #define PCSR_S1_BVD1 (1<<12)
47 #define PCSR_S1_BVD2 (1<<13)
48
49 #define PCCR_S0_RST (1<<0)
50 #define PCCR_S1_RST (1<<1)
51 #define PCCR_S0_FLT (1<<2)
52 #define PCCR_S1_FLT (1<<3)
53 #define PCCR_S0_PWAITEN (1<<4)
54 #define PCCR_S1_PWAITEN (1<<5)
55 #define PCCR_S0_PSE (1<<6)
56 #define PCCR_S1_PSE (1<<7)
57
58 #define PCSSR_S0_SLEEP (1<<0)
59 #define PCSSR_S1_SLEEP (1<<1)
60
61 #define IDX_IRQ_S0_READY_NINT (0)
62 #define IDX_IRQ_S0_CD_VALID (1)
63 #define IDX_IRQ_S0_BVD1_STSCHG (2)
64 #define IDX_IRQ_S1_READY_NINT (3)
65 #define IDX_IRQ_S1_CD_VALID (4)
66 #define IDX_IRQ_S1_BVD1_STSCHG (5)
67 #define NUM_IRQS (6)
68
sa1111_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)69 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
70 {
71 struct sa1111_pcmcia_socket *s = to_skt(skt);
72 u32 status = readl_relaxed(s->dev->mapbase + PCSR);
73
74 switch (skt->nr) {
75 case 0:
76 state->detect = status & PCSR_S0_DETECT ? 0 : 1;
77 state->ready = status & PCSR_S0_READY ? 1 : 0;
78 state->bvd1 = status & PCSR_S0_BVD1 ? 1 : 0;
79 state->bvd2 = status & PCSR_S0_BVD2 ? 1 : 0;
80 state->wrprot = status & PCSR_S0_WP ? 1 : 0;
81 state->vs_3v = status & PCSR_S0_VS1 ? 0 : 1;
82 state->vs_Xv = status & PCSR_S0_VS2 ? 0 : 1;
83 break;
84
85 case 1:
86 state->detect = status & PCSR_S1_DETECT ? 0 : 1;
87 state->ready = status & PCSR_S1_READY ? 1 : 0;
88 state->bvd1 = status & PCSR_S1_BVD1 ? 1 : 0;
89 state->bvd2 = status & PCSR_S1_BVD2 ? 1 : 0;
90 state->wrprot = status & PCSR_S1_WP ? 1 : 0;
91 state->vs_3v = status & PCSR_S1_VS1 ? 0 : 1;
92 state->vs_Xv = status & PCSR_S1_VS2 ? 0 : 1;
93 break;
94 }
95 }
96
sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)97 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
98 {
99 struct sa1111_pcmcia_socket *s = to_skt(skt);
100 u32 pccr_skt_mask, pccr_set_mask, val;
101 unsigned long flags;
102
103 switch (skt->nr) {
104 case 0:
105 pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
106 break;
107
108 case 1:
109 pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
110 break;
111
112 default:
113 return -1;
114 }
115
116 pccr_set_mask = 0;
117
118 if (state->Vcc != 0)
119 pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
120 if (state->Vcc == 50)
121 pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
122 if (state->flags & SS_RESET)
123 pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
124 if (state->flags & SS_OUTPUT_ENA)
125 pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
126
127 local_irq_save(flags);
128 val = readl_relaxed(s->dev->mapbase + PCCR);
129 val &= ~pccr_skt_mask;
130 val |= pccr_set_mask & pccr_skt_mask;
131 writel_relaxed(val, s->dev->mapbase + PCCR);
132 local_irq_restore(flags);
133
134 return 0;
135 }
136
sa1111_pcmcia_add(struct sa1111_dev * dev,struct pcmcia_low_level * ops,int (* add)(struct soc_pcmcia_socket *))137 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
138 int (*add)(struct soc_pcmcia_socket *))
139 {
140 struct sa1111_pcmcia_socket *s;
141 struct clk *clk;
142 int i, ret = 0, irqs[NUM_IRQS];
143
144 clk = devm_clk_get(&dev->dev, NULL);
145 if (IS_ERR(clk))
146 return PTR_ERR(clk);
147
148 for (i = 0; i < NUM_IRQS; i++) {
149 irqs[i] = sa1111_get_irq(dev, i);
150 if (irqs[i] <= 0)
151 return irqs[i] ? : -ENXIO;
152 }
153
154 ops->socket_state = sa1111_pcmcia_socket_state;
155
156 for (i = 0; i < ops->nr; i++) {
157 s = kzalloc(sizeof(*s), GFP_KERNEL);
158 if (!s)
159 return -ENOMEM;
160
161 s->soc.nr = ops->first + i;
162 s->soc.clk = clk;
163
164 soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
165 s->dev = dev;
166 if (s->soc.nr) {
167 s->soc.socket.pci_irq = irqs[IDX_IRQ_S1_READY_NINT];
168 s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S1_CD_VALID];
169 s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
170 s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S1_BVD1_STSCHG];
171 s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
172 } else {
173 s->soc.socket.pci_irq = irqs[IDX_IRQ_S0_READY_NINT];
174 s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S0_CD_VALID];
175 s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
176 s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S0_BVD1_STSCHG];
177 s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
178 }
179
180 ret = add(&s->soc);
181 if (ret == 0) {
182 s->next = dev_get_drvdata(&dev->dev);
183 dev_set_drvdata(&dev->dev, s);
184 } else
185 kfree(s);
186 }
187
188 return ret;
189 }
190
pcmcia_probe(struct sa1111_dev * dev)191 static int pcmcia_probe(struct sa1111_dev *dev)
192 {
193 void __iomem *base;
194 int ret;
195
196 ret = sa1111_enable_device(dev);
197 if (ret)
198 return ret;
199
200 dev_set_drvdata(&dev->dev, NULL);
201
202 if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
203 sa1111_disable_device(dev);
204 return -EBUSY;
205 }
206
207 base = dev->mapbase;
208
209 /*
210 * Initialise the suspend state.
211 */
212 writel_relaxed(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
213 writel_relaxed(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);
214
215 ret = -ENODEV;
216 #ifdef CONFIG_SA1100_BADGE4
217 if (machine_is_badge4())
218 ret = pcmcia_badge4_init(dev);
219 #endif
220 #ifdef CONFIG_SA1100_JORNADA720
221 if (machine_is_jornada720())
222 ret = pcmcia_jornada720_init(dev);
223 #endif
224 #ifdef CONFIG_ARCH_LUBBOCK
225 if (machine_is_lubbock())
226 ret = pcmcia_lubbock_init(dev);
227 #endif
228 #ifdef CONFIG_ASSABET_NEPONSET
229 if (machine_is_assabet())
230 ret = pcmcia_neponset_init(dev);
231 #endif
232
233 if (ret) {
234 release_mem_region(dev->res.start, 512);
235 sa1111_disable_device(dev);
236 }
237
238 return ret;
239 }
240
pcmcia_remove(struct sa1111_dev * dev)241 static int pcmcia_remove(struct sa1111_dev *dev)
242 {
243 struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
244
245 dev_set_drvdata(&dev->dev, NULL);
246
247 for (; s; s = next) {
248 next = s->next;
249 soc_pcmcia_remove_one(&s->soc);
250 kfree(s);
251 }
252
253 release_mem_region(dev->res.start, 512);
254 sa1111_disable_device(dev);
255 return 0;
256 }
257
258 static struct sa1111_driver pcmcia_driver = {
259 .drv = {
260 .name = "sa1111-pcmcia",
261 },
262 .devid = SA1111_DEVID_PCMCIA,
263 .probe = pcmcia_probe,
264 .remove = pcmcia_remove,
265 };
266
sa1111_drv_pcmcia_init(void)267 static int __init sa1111_drv_pcmcia_init(void)
268 {
269 return sa1111_driver_register(&pcmcia_driver);
270 }
271
sa1111_drv_pcmcia_exit(void)272 static void __exit sa1111_drv_pcmcia_exit(void)
273 {
274 sa1111_driver_unregister(&pcmcia_driver);
275 }
276
277 fs_initcall(sa1111_drv_pcmcia_init);
278 module_exit(sa1111_drv_pcmcia_exit);
279
280 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
281 MODULE_LICENSE("GPL");
282