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/mach-types.h>
22 #include <asm/irq.h>
23 
24 #include "sa1111_generic.h"
25 
26 /*
27  * These are offsets from the above base.
28  */
29 #define PCCR	0x0000
30 #define PCSSR	0x0004
31 #define PCSR	0x0008
32 
33 #define PCSR_S0_READY	(1<<0)
34 #define PCSR_S1_READY	(1<<1)
35 #define PCSR_S0_DETECT	(1<<2)
36 #define PCSR_S1_DETECT	(1<<3)
37 #define PCSR_S0_VS1	(1<<4)
38 #define PCSR_S0_VS2	(1<<5)
39 #define PCSR_S1_VS1	(1<<6)
40 #define PCSR_S1_VS2	(1<<7)
41 #define PCSR_S0_WP	(1<<8)
42 #define PCSR_S1_WP	(1<<9)
43 #define PCSR_S0_BVD1	(1<<10)
44 #define PCSR_S0_BVD2	(1<<11)
45 #define PCSR_S1_BVD1	(1<<12)
46 #define PCSR_S1_BVD2	(1<<13)
47 
48 #define PCCR_S0_RST	(1<<0)
49 #define PCCR_S1_RST	(1<<1)
50 #define PCCR_S0_FLT	(1<<2)
51 #define PCCR_S1_FLT	(1<<3)
52 #define PCCR_S0_PWAITEN	(1<<4)
53 #define PCCR_S1_PWAITEN	(1<<5)
54 #define PCCR_S0_PSE	(1<<6)
55 #define PCCR_S1_PSE	(1<<7)
56 
57 #define PCSSR_S0_SLEEP	(1<<0)
58 #define PCSSR_S1_SLEEP	(1<<1)
59 
60 #define IDX_IRQ_S0_READY_NINT	(0)
61 #define IDX_IRQ_S0_CD_VALID	(1)
62 #define IDX_IRQ_S0_BVD1_STSCHG	(2)
63 #define IDX_IRQ_S1_READY_NINT	(3)
64 #define IDX_IRQ_S1_CD_VALID	(4)
65 #define IDX_IRQ_S1_BVD1_STSCHG	(5)
66 
67 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
68 {
69 	struct sa1111_pcmcia_socket *s = to_skt(skt);
70 	unsigned long status = sa1111_readl(s->dev->mapbase + PCSR);
71 
72 	switch (skt->nr) {
73 	case 0:
74 		state->detect = status & PCSR_S0_DETECT ? 0 : 1;
75 		state->ready  = status & PCSR_S0_READY  ? 1 : 0;
76 		state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
77 		state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
78 		state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
79 		state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
80 		state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
81 		break;
82 
83 	case 1:
84 		state->detect = status & PCSR_S1_DETECT ? 0 : 1;
85 		state->ready  = status & PCSR_S1_READY  ? 1 : 0;
86 		state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
87 		state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
88 		state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
89 		state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
90 		state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
91 		break;
92 	}
93 }
94 
95 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
96 {
97 	struct sa1111_pcmcia_socket *s = to_skt(skt);
98 	unsigned int pccr_skt_mask, pccr_set_mask, val;
99 	unsigned long flags;
100 
101 	switch (skt->nr) {
102 	case 0:
103 		pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
104 		break;
105 
106 	case 1:
107 		pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
108 		break;
109 
110 	default:
111 		return -1;
112 	}
113 
114 	pccr_set_mask = 0;
115 
116 	if (state->Vcc != 0)
117 		pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
118 	if (state->Vcc == 50)
119 		pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
120 	if (state->flags & SS_RESET)
121 		pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
122 	if (state->flags & SS_OUTPUT_ENA)
123 		pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
124 
125 	local_irq_save(flags);
126 	val = sa1111_readl(s->dev->mapbase + PCCR);
127 	val &= ~pccr_skt_mask;
128 	val |= pccr_set_mask & pccr_skt_mask;
129 	sa1111_writel(val, s->dev->mapbase + PCCR);
130 	local_irq_restore(flags);
131 
132 	return 0;
133 }
134 
135 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
136 	int (*add)(struct soc_pcmcia_socket *))
137 {
138 	struct sa1111_pcmcia_socket *s;
139 	struct clk *clk;
140 	int i, ret = 0;
141 
142 	clk = devm_clk_get(&dev->dev, NULL);
143 	if (IS_ERR(clk))
144 		return PTR_ERR(clk);
145 
146 	ops->socket_state = sa1111_pcmcia_socket_state;
147 
148 	for (i = 0; i < ops->nr; i++) {
149 		s = kzalloc(sizeof(*s), GFP_KERNEL);
150 		if (!s)
151 			return -ENOMEM;
152 
153 		s->soc.nr = ops->first + i;
154 		s->soc.clk = clk;
155 
156 		soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
157 		s->dev = dev;
158 		if (s->soc.nr) {
159 			s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S1_READY_NINT];
160 			s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S1_CD_VALID];
161 			s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
162 			s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S1_BVD1_STSCHG];
163 			s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
164 		} else {
165 			s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S0_READY_NINT];
166 			s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S0_CD_VALID];
167 			s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
168 			s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S0_BVD1_STSCHG];
169 			s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
170 		}
171 
172 		ret = add(&s->soc);
173 		if (ret == 0) {
174 			s->next = dev_get_drvdata(&dev->dev);
175 			dev_set_drvdata(&dev->dev, s);
176 		} else
177 			kfree(s);
178 	}
179 
180 	return ret;
181 }
182 
183 static int pcmcia_probe(struct sa1111_dev *dev)
184 {
185 	void __iomem *base;
186 	int ret;
187 
188 	ret = sa1111_enable_device(dev);
189 	if (ret)
190 		return ret;
191 
192 	dev_set_drvdata(&dev->dev, NULL);
193 
194 	if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
195 		sa1111_disable_device(dev);
196 		return -EBUSY;
197 	}
198 
199 	base = dev->mapbase;
200 
201 	/*
202 	 * Initialise the suspend state.
203 	 */
204 	sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
205 	sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);
206 
207 	ret = -ENODEV;
208 #ifdef CONFIG_SA1100_BADGE4
209 	if (machine_is_badge4())
210 		ret = pcmcia_badge4_init(dev);
211 #endif
212 #ifdef CONFIG_SA1100_JORNADA720
213 	if (machine_is_jornada720())
214 		ret = pcmcia_jornada720_init(dev);
215 #endif
216 #ifdef CONFIG_ARCH_LUBBOCK
217 	if (machine_is_lubbock())
218 		ret = pcmcia_lubbock_init(dev);
219 #endif
220 #ifdef CONFIG_ASSABET_NEPONSET
221 	if (machine_is_assabet())
222 		ret = pcmcia_neponset_init(dev);
223 #endif
224 
225 	if (ret) {
226 		release_mem_region(dev->res.start, 512);
227 		sa1111_disable_device(dev);
228 	}
229 
230 	return ret;
231 }
232 
233 static int pcmcia_remove(struct sa1111_dev *dev)
234 {
235 	struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
236 
237 	dev_set_drvdata(&dev->dev, NULL);
238 
239 	for (; s; s = next) {
240 		next = s->next;
241 		soc_pcmcia_remove_one(&s->soc);
242 		kfree(s);
243 	}
244 
245 	release_mem_region(dev->res.start, 512);
246 	sa1111_disable_device(dev);
247 	return 0;
248 }
249 
250 static struct sa1111_driver pcmcia_driver = {
251 	.drv = {
252 		.name	= "sa1111-pcmcia",
253 	},
254 	.devid		= SA1111_DEVID_PCMCIA,
255 	.probe		= pcmcia_probe,
256 	.remove		= pcmcia_remove,
257 };
258 
259 static int __init sa1111_drv_pcmcia_init(void)
260 {
261 	return sa1111_driver_register(&pcmcia_driver);
262 }
263 
264 static void __exit sa1111_drv_pcmcia_exit(void)
265 {
266 	sa1111_driver_unregister(&pcmcia_driver);
267 }
268 
269 fs_initcall(sa1111_drv_pcmcia_init);
270 module_exit(sa1111_drv_pcmcia_exit);
271 
272 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
273 MODULE_LICENSE("GPL");
274