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 | |
68 | void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state) |
69 | { |
70 | struct sa1111_pcmcia_socket *s = to_skt(s: 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 | |
96 | int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) |
97 | { |
98 | struct sa1111_pcmcia_socket *s = to_skt(s: 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 | |
136 | int 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->dev, NULL); |
144 | if (IS_ERR(ptr: clk)) |
145 | return PTR_ERR(ptr: 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(size: 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(skt: &s->soc, ops, dev: &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->dev); |
182 | dev_set_drvdata(dev: &dev->dev, data: s); |
183 | } else |
184 | kfree(objp: s); |
185 | } |
186 | |
187 | return ret; |
188 | } |
189 | |
190 | static 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->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 | |
232 | static void pcmcia_remove(struct sa1111_dev *dev) |
233 | { |
234 | struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(dev: &dev->dev); |
235 | |
236 | dev_set_drvdata(dev: &dev->dev, NULL); |
237 | |
238 | for (; s; s = next) { |
239 | next = s->next; |
240 | soc_pcmcia_remove_one(skt: &s->soc); |
241 | kfree(objp: s); |
242 | } |
243 | |
244 | release_mem_region(dev->res.start, 512); |
245 | sa1111_disable_device(dev); |
246 | } |
247 | |
248 | static 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 | |
257 | static int __init sa1111_drv_pcmcia_init(void) |
258 | { |
259 | return sa1111_driver_register(&pcmcia_driver); |
260 | } |
261 | |
262 | static void __exit sa1111_drv_pcmcia_exit(void) |
263 | { |
264 | sa1111_driver_unregister(&pcmcia_driver); |
265 | } |
266 | |
267 | fs_initcall(sa1111_drv_pcmcia_init); |
268 | module_exit(sa1111_drv_pcmcia_exit); |
269 | |
270 | MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver" ); |
271 | MODULE_LICENSE("GPL" ); |
272 | |