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 <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#define NUM_IRQS		(6)
67
68void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
69{
70	struct sa1111_pcmcia_socket *s = to_skt(skt);
71	u32 status = readl_relaxed(s->dev->mapbase + PCSR);
72
73	switch (skt->nr) {
74	case 0:
75		state->detect = status & PCSR_S0_DETECT ? 0 : 1;
76		state->ready  = status & PCSR_S0_READY  ? 1 : 0;
77		state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
78		state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
79		state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
80		state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
81		state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
82		break;
83
84	case 1:
85		state->detect = status & PCSR_S1_DETECT ? 0 : 1;
86		state->ready  = status & PCSR_S1_READY  ? 1 : 0;
87		state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
88		state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
89		state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
90		state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
91		state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
92		break;
93	}
94}
95
96int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
97{
98	struct sa1111_pcmcia_socket *s = to_skt(skt);
99	u32 pccr_skt_mask, pccr_set_mask, val;
100	unsigned long flags;
101
102	switch (skt->nr) {
103	case 0:
104		pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
105		break;
106
107	case 1:
108		pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
109		break;
110
111	default:
112		return -1;
113	}
114
115	pccr_set_mask = 0;
116
117	if (state->Vcc != 0)
118		pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
119	if (state->Vcc == 50)
120		pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
121	if (state->flags & SS_RESET)
122		pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
123	if (state->flags & SS_OUTPUT_ENA)
124		pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
125
126	local_irq_save(flags);
127	val = readl_relaxed(s->dev->mapbase + PCCR);
128	val &= ~pccr_skt_mask;
129	val |= pccr_set_mask & pccr_skt_mask;
130	writel_relaxed(val, s->dev->mapbase + PCCR);
131	local_irq_restore(flags);
132
133	return 0;
134}
135
136int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
137	int (*add)(struct soc_pcmcia_socket *))
138{
139	struct sa1111_pcmcia_socket *s;
140	struct clk *clk;
141	int i, ret = 0, irqs[NUM_IRQS];
142
143	clk = devm_clk_get(&dev->dev, NULL);
144	if (IS_ERR(clk))
145		return PTR_ERR(clk);
146
147	for (i = 0; i < NUM_IRQS; i++) {
148		irqs[i] = sa1111_get_irq(dev, i);
149		if (irqs[i] <= 0)
150			return irqs[i] ? : -ENXIO;
151	}
152
153	ops->socket_state = sa1111_pcmcia_socket_state;
154
155	for (i = 0; i < ops->nr; i++) {
156		s = kzalloc(sizeof(*s), GFP_KERNEL);
157		if (!s)
158			return -ENOMEM;
159
160		s->soc.nr = ops->first + i;
161		s->soc.clk = clk;
162
163		soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
164		s->dev = dev;
165		if (s->soc.nr) {
166			s->soc.socket.pci_irq = irqs[IDX_IRQ_S1_READY_NINT];
167			s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S1_CD_VALID];
168			s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
169			s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S1_BVD1_STSCHG];
170			s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
171		} else {
172			s->soc.socket.pci_irq = irqs[IDX_IRQ_S0_READY_NINT];
173			s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S0_CD_VALID];
174			s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
175			s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S0_BVD1_STSCHG];
176			s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
177		}
178
179		ret = add(&s->soc);
180		if (ret == 0) {
181			s->next = dev_get_drvdata(&dev->dev);
182			dev_set_drvdata(&dev->dev, s);
183		} else
184			kfree(s);
185	}
186
187	return ret;
188}
189
190static int pcmcia_probe(struct sa1111_dev *dev)
191{
192	void __iomem *base;
193	int ret;
194
195	ret = sa1111_enable_device(dev);
196	if (ret)
197		return ret;
198
199	dev_set_drvdata(&dev->dev, NULL);
200
201	if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
202		sa1111_disable_device(dev);
203		return -EBUSY;
204	}
205
206	base = dev->mapbase;
207
208	/*
209	 * Initialise the suspend state.
210	 */
211	writel_relaxed(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
212	writel_relaxed(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);
213
214	ret = -ENODEV;
215#ifdef CONFIG_SA1100_JORNADA720
216	if (machine_is_jornada720())
217		ret = pcmcia_jornada720_init(dev);
218#endif
219#ifdef CONFIG_ASSABET_NEPONSET
220	if (machine_is_assabet())
221		ret = pcmcia_neponset_init(dev);
222#endif
223
224	if (ret) {
225		release_mem_region(dev->res.start, 512);
226		sa1111_disable_device(dev);
227	}
228
229	return ret;
230}
231
232static void pcmcia_remove(struct sa1111_dev *dev)
233{
234	struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
235
236	dev_set_drvdata(&dev->dev, NULL);
237
238	for (; s; s = next) {
239		next = s->next;
240		soc_pcmcia_remove_one(&s->soc);
241		kfree(s);
242	}
243
244	release_mem_region(dev->res.start, 512);
245	sa1111_disable_device(dev);
246}
247
248static struct sa1111_driver pcmcia_driver = {
249	.drv = {
250		.name	= "sa1111-pcmcia",
251	},
252	.devid		= SA1111_DEVID_PCMCIA,
253	.probe		= pcmcia_probe,
254	.remove		= pcmcia_remove,
255};
256
257static int __init sa1111_drv_pcmcia_init(void)
258{
259	return sa1111_driver_register(&pcmcia_driver);
260}
261
262static void __exit sa1111_drv_pcmcia_exit(void)
263{
264	sa1111_driver_unregister(&pcmcia_driver);
265}
266
267fs_initcall(sa1111_drv_pcmcia_init);
268module_exit(sa1111_drv_pcmcia_exit);
269
270MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
271MODULE_LICENSE("GPL");
272