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
66void 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
94int 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
134int 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
182static 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
221static 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
238static 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
247static int __init sa1111_drv_pcmcia_init(void)
248{
249	return sa1111_driver_register(&pcmcia_driver);
250}
251
252static void __exit sa1111_drv_pcmcia_exit(void)
253{
254	sa1111_driver_unregister(&pcmcia_driver);
255}
256
257fs_initcall(sa1111_drv_pcmcia_init);
258module_exit(sa1111_drv_pcmcia_exit);
259
260MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
261MODULE_LICENSE("GPL");
262