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 
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 
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 
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 
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 
241 static void 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 }
256 
257 static struct sa1111_driver pcmcia_driver = {
258 	.drv = {
259 		.name	= "sa1111-pcmcia",
260 	},
261 	.devid		= SA1111_DEVID_PCMCIA,
262 	.probe		= pcmcia_probe,
263 	.remove		= pcmcia_remove,
264 };
265 
266 static int __init sa1111_drv_pcmcia_init(void)
267 {
268 	return sa1111_driver_register(&pcmcia_driver);
269 }
270 
271 static void __exit sa1111_drv_pcmcia_exit(void)
272 {
273 	sa1111_driver_unregister(&pcmcia_driver);
274 }
275 
276 fs_initcall(sa1111_drv_pcmcia_init);
277 module_exit(sa1111_drv_pcmcia_exit);
278 
279 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
280 MODULE_LICENSE("GPL");
281