1 /*
2 * linux/drivers/pcmcia/sa1111_generic.c
3 *
4 * We implement the generic parts of a SA1111 PCMCIA driver. This
5 * basically means we handle everything except controlling the
6 * power. Power is machine specific...
7 */
8 #include <linux/module.h>
9 #include <linux/kernel.h>
10 #include <linux/ioport.h>
11 #include <linux/device.h>
12 #include <linux/interrupt.h>
13 #include <linux/init.h>
14 #include <linux/io.h>
15 #include <linux/slab.h>
16
17 #include <pcmcia/ss.h>
18
19 #include <mach/hardware.h>
20 #include <asm/hardware/sa1111.h>
21 #include <asm/irq.h>
22
23 #include "sa1111_generic.h"
24
25 /*
26 * These are offsets from the above base.
27 */
28 #define PCCR 0x0000
29 #define PCSSR 0x0004
30 #define PCSR 0x0008
31
32 #define PCSR_S0_READY (1<<0)
33 #define PCSR_S1_READY (1<<1)
34 #define PCSR_S0_DETECT (1<<2)
35 #define PCSR_S1_DETECT (1<<3)
36 #define PCSR_S0_VS1 (1<<4)
37 #define PCSR_S0_VS2 (1<<5)
38 #define PCSR_S1_VS1 (1<<6)
39 #define PCSR_S1_VS2 (1<<7)
40 #define PCSR_S0_WP (1<<8)
41 #define PCSR_S1_WP (1<<9)
42 #define PCSR_S0_BVD1 (1<<10)
43 #define PCSR_S0_BVD2 (1<<11)
44 #define PCSR_S1_BVD1 (1<<12)
45 #define PCSR_S1_BVD2 (1<<13)
46
47 #define PCCR_S0_RST (1<<0)
48 #define PCCR_S1_RST (1<<1)
49 #define PCCR_S0_FLT (1<<2)
50 #define PCCR_S1_FLT (1<<3)
51 #define PCCR_S0_PWAITEN (1<<4)
52 #define PCCR_S1_PWAITEN (1<<5)
53 #define PCCR_S0_PSE (1<<6)
54 #define PCCR_S1_PSE (1<<7)
55
56 #define PCSSR_S0_SLEEP (1<<0)
57 #define PCSSR_S1_SLEEP (1<<1)
58
59 #define IDX_IRQ_S0_READY_NINT (0)
60 #define IDX_IRQ_S0_CD_VALID (1)
61 #define IDX_IRQ_S0_BVD1_STSCHG (2)
62 #define IDX_IRQ_S1_READY_NINT (3)
63 #define IDX_IRQ_S1_CD_VALID (4)
64 #define IDX_IRQ_S1_BVD1_STSCHG (5)
65
sa1111_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)66 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
67 {
68 struct sa1111_pcmcia_socket *s = to_skt(skt);
69 unsigned long status = sa1111_readl(s->dev->mapbase + PCSR);
70
71 switch (skt->nr) {
72 case 0:
73 state->detect = status & PCSR_S0_DETECT ? 0 : 1;
74 state->ready = status & PCSR_S0_READY ? 1 : 0;
75 state->bvd1 = status & PCSR_S0_BVD1 ? 1 : 0;
76 state->bvd2 = status & PCSR_S0_BVD2 ? 1 : 0;
77 state->wrprot = status & PCSR_S0_WP ? 1 : 0;
78 state->vs_3v = status & PCSR_S0_VS1 ? 0 : 1;
79 state->vs_Xv = status & PCSR_S0_VS2 ? 0 : 1;
80 break;
81
82 case 1:
83 state->detect = status & PCSR_S1_DETECT ? 0 : 1;
84 state->ready = status & PCSR_S1_READY ? 1 : 0;
85 state->bvd1 = status & PCSR_S1_BVD1 ? 1 : 0;
86 state->bvd2 = status & PCSR_S1_BVD2 ? 1 : 0;
87 state->wrprot = status & PCSR_S1_WP ? 1 : 0;
88 state->vs_3v = status & PCSR_S1_VS1 ? 0 : 1;
89 state->vs_Xv = status & PCSR_S1_VS2 ? 0 : 1;
90 break;
91 }
92 }
93
sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)94 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
95 {
96 struct sa1111_pcmcia_socket *s = to_skt(skt);
97 unsigned int pccr_skt_mask, pccr_set_mask, val;
98 unsigned long flags;
99
100 switch (skt->nr) {
101 case 0:
102 pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
103 break;
104
105 case 1:
106 pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
107 break;
108
109 default:
110 return -1;
111 }
112
113 pccr_set_mask = 0;
114
115 if (state->Vcc != 0)
116 pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
117 if (state->Vcc == 50)
118 pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
119 if (state->flags & SS_RESET)
120 pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
121 if (state->flags & SS_OUTPUT_ENA)
122 pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
123
124 local_irq_save(flags);
125 val = sa1111_readl(s->dev->mapbase + PCCR);
126 val &= ~pccr_skt_mask;
127 val |= pccr_set_mask & pccr_skt_mask;
128 sa1111_writel(val, s->dev->mapbase + PCCR);
129 local_irq_restore(flags);
130
131 return 0;
132 }
133
sa1111_pcmcia_add(struct sa1111_dev * dev,struct pcmcia_low_level * ops,int (* add)(struct soc_pcmcia_socket *))134 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
135 int (*add)(struct soc_pcmcia_socket *))
136 {
137 struct sa1111_pcmcia_socket *s;
138 struct clk *clk;
139 int i, ret = 0;
140
141 clk = devm_clk_get(&dev->dev, NULL);
142 if (IS_ERR(clk))
143 return PTR_ERR(clk);
144
145 ops->socket_state = sa1111_pcmcia_socket_state;
146
147 for (i = 0; i < ops->nr; i++) {
148 s = kzalloc(sizeof(*s), GFP_KERNEL);
149 if (!s)
150 return -ENOMEM;
151
152 s->soc.nr = ops->first + i;
153 s->soc.clk = clk;
154
155 soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
156 s->dev = dev;
157 if (s->soc.nr) {
158 s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S1_READY_NINT];
159 s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S1_CD_VALID];
160 s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
161 s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S1_BVD1_STSCHG];
162 s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
163 } else {
164 s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S0_READY_NINT];
165 s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S0_CD_VALID];
166 s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
167 s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S0_BVD1_STSCHG];
168 s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
169 }
170
171 ret = add(&s->soc);
172 if (ret == 0) {
173 s->next = dev_get_drvdata(&dev->dev);
174 dev_set_drvdata(&dev->dev, s);
175 } else
176 kfree(s);
177 }
178
179 return ret;
180 }
181
pcmcia_probe(struct sa1111_dev * dev)182 static int pcmcia_probe(struct sa1111_dev *dev)
183 {
184 void __iomem *base;
185 int ret;
186
187 ret = sa1111_enable_device(dev);
188 if (ret)
189 return ret;
190
191 dev_set_drvdata(&dev->dev, NULL);
192
193 if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
194 sa1111_disable_device(dev);
195 return -EBUSY;
196 }
197
198 base = dev->mapbase;
199
200 /*
201 * Initialise the suspend state.
202 */
203 sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
204 sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);
205
206 #ifdef CONFIG_SA1100_BADGE4
207 pcmcia_badge4_init(dev);
208 #endif
209 #ifdef CONFIG_SA1100_JORNADA720
210 pcmcia_jornada720_init(dev);
211 #endif
212 #ifdef CONFIG_ARCH_LUBBOCK
213 pcmcia_lubbock_init(dev);
214 #endif
215 #ifdef CONFIG_ASSABET_NEPONSET
216 pcmcia_neponset_init(dev);
217 #endif
218 return 0;
219 }
220
pcmcia_remove(struct sa1111_dev * dev)221 static int pcmcia_remove(struct sa1111_dev *dev)
222 {
223 struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
224
225 dev_set_drvdata(&dev->dev, NULL);
226
227 for (; s; s = next) {
228 next = s->next;
229 soc_pcmcia_remove_one(&s->soc);
230 kfree(s);
231 }
232
233 release_mem_region(dev->res.start, 512);
234 sa1111_disable_device(dev);
235 return 0;
236 }
237
238 static struct sa1111_driver pcmcia_driver = {
239 .drv = {
240 .name = "sa1111-pcmcia",
241 },
242 .devid = SA1111_DEVID_PCMCIA,
243 .probe = pcmcia_probe,
244 .remove = pcmcia_remove,
245 };
246
sa1111_drv_pcmcia_init(void)247 static int __init sa1111_drv_pcmcia_init(void)
248 {
249 return sa1111_driver_register(&pcmcia_driver);
250 }
251
sa1111_drv_pcmcia_exit(void)252 static void __exit sa1111_drv_pcmcia_exit(void)
253 {
254 sa1111_driver_unregister(&pcmcia_driver);
255 }
256
257 fs_initcall(sa1111_drv_pcmcia_init);
258 module_exit(sa1111_drv_pcmcia_exit);
259
260 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
261 MODULE_LICENSE("GPL");
262