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 
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 
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 
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 	int i, ret = 0;
139 
140 	ops->socket_state = sa1111_pcmcia_socket_state;
141 
142 	for (i = 0; i < ops->nr; i++) {
143 		s = kzalloc(sizeof(*s), GFP_KERNEL);
144 		if (!s)
145 			return -ENOMEM;
146 
147 		s->soc.nr = ops->first + i;
148 		s->soc.clk = clk_get(&dev->dev, NULL);
149 		if (IS_ERR(s->soc.clk)) {
150 			ret = PTR_ERR(s->soc.clk);
151 			kfree(s);
152 			return ret;
153 		}
154 		soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
155 		s->dev = dev;
156 		if (s->soc.nr) {
157 			s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S1_READY_NINT];
158 			s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S1_CD_VALID];
159 			s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
160 			s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S1_BVD1_STSCHG];
161 			s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
162 		} else {
163 			s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S0_READY_NINT];
164 			s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S0_CD_VALID];
165 			s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
166 			s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S0_BVD1_STSCHG];
167 			s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
168 		}
169 
170 		ret = add(&s->soc);
171 		if (ret == 0) {
172 			s->next = dev_get_drvdata(&dev->dev);
173 			dev_set_drvdata(&dev->dev, s);
174 		} else
175 			kfree(s);
176 	}
177 
178 	return ret;
179 }
180 
181 static int pcmcia_probe(struct sa1111_dev *dev)
182 {
183 	void __iomem *base;
184 	int ret;
185 
186 	ret = sa1111_enable_device(dev);
187 	if (ret)
188 		return ret;
189 
190 	dev_set_drvdata(&dev->dev, NULL);
191 
192 	if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
193 		sa1111_disable_device(dev);
194 		return -EBUSY;
195 	}
196 
197 	base = dev->mapbase;
198 
199 	/*
200 	 * Initialise the suspend state.
201 	 */
202 	sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
203 	sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);
204 
205 #ifdef CONFIG_SA1100_BADGE4
206 	pcmcia_badge4_init(dev);
207 #endif
208 #ifdef CONFIG_SA1100_JORNADA720
209 	pcmcia_jornada720_init(dev);
210 #endif
211 #ifdef CONFIG_ARCH_LUBBOCK
212 	pcmcia_lubbock_init(dev);
213 #endif
214 #ifdef CONFIG_ASSABET_NEPONSET
215 	pcmcia_neponset_init(dev);
216 #endif
217 	return 0;
218 }
219 
220 static int pcmcia_remove(struct sa1111_dev *dev)
221 {
222 	struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
223 
224 	dev_set_drvdata(&dev->dev, NULL);
225 
226 	for (; s; s = next) {
227 		next = s->next;
228 		soc_pcmcia_remove_one(&s->soc);
229 		clk_put(s->soc.clk);
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 
247 static int __init sa1111_drv_pcmcia_init(void)
248 {
249 	return sa1111_driver_register(&pcmcia_driver);
250 }
251 
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