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 
15 #include <pcmcia/ss.h>
16 
17 #include <mach/hardware.h>
18 #include <asm/hardware/sa1111.h>
19 #include <asm/io.h>
20 #include <asm/irq.h>
21 
22 #include "sa1111_generic.h"
23 
24 static struct pcmcia_irqs irqs[] = {
25 	{ 0, IRQ_S0_CD_VALID,    "SA1111 PCMCIA card detect" },
26 	{ 0, IRQ_S0_BVD1_STSCHG, "SA1111 PCMCIA BVD1"        },
27 	{ 1, IRQ_S1_CD_VALID,    "SA1111 CF card detect"     },
28 	{ 1, IRQ_S1_BVD1_STSCHG, "SA1111 CF BVD1"            },
29 };
30 
31 int sa1111_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
32 {
33 	if (skt->irq == NO_IRQ)
34 		skt->irq = skt->nr ? IRQ_S1_READY_NINT : IRQ_S0_READY_NINT;
35 
36 	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
37 }
38 
39 void sa1111_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
40 {
41 	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
42 }
43 
44 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
45 {
46 	struct sa1111_dev *sadev = SA1111_DEV(skt->dev);
47 	unsigned long status = sa1111_readl(sadev->mapbase + SA1111_PCSR);
48 
49 	switch (skt->nr) {
50 	case 0:
51 		state->detect = status & PCSR_S0_DETECT ? 0 : 1;
52 		state->ready  = status & PCSR_S0_READY  ? 1 : 0;
53 		state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
54 		state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
55 		state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
56 		state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
57 		state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
58 		break;
59 
60 	case 1:
61 		state->detect = status & PCSR_S1_DETECT ? 0 : 1;
62 		state->ready  = status & PCSR_S1_READY  ? 1 : 0;
63 		state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
64 		state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
65 		state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
66 		state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
67 		state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
68 		break;
69 	}
70 }
71 
72 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
73 {
74 	struct sa1111_dev *sadev = SA1111_DEV(skt->dev);
75 	unsigned int pccr_skt_mask, pccr_set_mask, val;
76 	unsigned long flags;
77 
78 	switch (skt->nr) {
79 	case 0:
80 		pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
81 		break;
82 
83 	case 1:
84 		pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
85 		break;
86 
87 	default:
88 		return -1;
89 	}
90 
91 	pccr_set_mask = 0;
92 
93 	if (state->Vcc != 0)
94 		pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
95 	if (state->Vcc == 50)
96 		pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
97 	if (state->flags & SS_RESET)
98 		pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
99 	if (state->flags & SS_OUTPUT_ENA)
100 		pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
101 
102 	local_irq_save(flags);
103 	val = sa1111_readl(sadev->mapbase + SA1111_PCCR);
104 	val &= ~pccr_skt_mask;
105 	val |= pccr_set_mask & pccr_skt_mask;
106 	sa1111_writel(val, sadev->mapbase + SA1111_PCCR);
107 	local_irq_restore(flags);
108 
109 	return 0;
110 }
111 
112 void sa1111_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
113 {
114 	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
115 }
116 
117 void sa1111_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
118 {
119 	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
120 }
121 
122 static int pcmcia_probe(struct sa1111_dev *dev)
123 {
124 	void __iomem *base;
125 
126 	if (!request_mem_region(dev->res.start, 512,
127 				SA1111_DRIVER_NAME(dev)))
128 		return -EBUSY;
129 
130 	base = dev->mapbase;
131 
132 	/*
133 	 * Initialise the suspend state.
134 	 */
135 	sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + SA1111_PCSSR);
136 	sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + SA1111_PCCR);
137 
138 #ifdef CONFIG_SA1100_BADGE4
139 	pcmcia_badge4_init(&dev->dev);
140 #endif
141 #ifdef CONFIG_SA1100_JORNADA720
142 	pcmcia_jornada720_init(&dev->dev);
143 #endif
144 #ifdef CONFIG_ARCH_LUBBOCK
145 	pcmcia_lubbock_init(dev);
146 #endif
147 #ifdef CONFIG_ASSABET_NEPONSET
148 	pcmcia_neponset_init(dev);
149 #endif
150 	return 0;
151 }
152 
153 static int __devexit pcmcia_remove(struct sa1111_dev *dev)
154 {
155 	soc_common_drv_pcmcia_remove(&dev->dev);
156 	release_mem_region(dev->res.start, 512);
157 	return 0;
158 }
159 
160 static int pcmcia_suspend(struct sa1111_dev *dev, pm_message_t state)
161 {
162 	return pcmcia_socket_dev_suspend(&dev->dev, state);
163 }
164 
165 static int pcmcia_resume(struct sa1111_dev *dev)
166 {
167 	return pcmcia_socket_dev_resume(&dev->dev);
168 }
169 
170 static struct sa1111_driver pcmcia_driver = {
171 	.drv = {
172 		.name	= "sa1111-pcmcia",
173 	},
174 	.devid		= SA1111_DEVID_PCMCIA,
175 	.probe		= pcmcia_probe,
176 	.remove		= __devexit_p(pcmcia_remove),
177 	.suspend	= pcmcia_suspend,
178 	.resume		= pcmcia_resume,
179 };
180 
181 static int __init sa1111_drv_pcmcia_init(void)
182 {
183 	return sa1111_driver_register(&pcmcia_driver);
184 }
185 
186 static void __exit sa1111_drv_pcmcia_exit(void)
187 {
188 	sa1111_driver_unregister(&pcmcia_driver);
189 }
190 
191 fs_initcall(sa1111_drv_pcmcia_init);
192 module_exit(sa1111_drv_pcmcia_exit);
193 
194 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
195 MODULE_LICENSE("GPL");
196