1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Sharp SL-C7xx Series PCMCIA routines |
4 | * |
5 | * Copyright (c) 2004-2005 Richard Purdie |
6 | * |
7 | * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c |
8 | */ |
9 | |
10 | #include <linux/module.h> |
11 | #include <linux/init.h> |
12 | #include <linux/kernel.h> |
13 | #include <linux/errno.h> |
14 | #include <linux/interrupt.h> |
15 | #include <linux/platform_device.h> |
16 | |
17 | #include <asm/mach-types.h> |
18 | #include <asm/irq.h> |
19 | #include <asm/hardware/scoop.h> |
20 | |
21 | #include <pcmcia/soc_common.h> |
22 | |
23 | #define NO_KEEP_VS 0x0001 |
24 | #define SCOOP_DEV platform_scoop_config->devs |
25 | |
26 | static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt) |
27 | { |
28 | struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr]; |
29 | |
30 | reset_scoop(scoopdev->dev); |
31 | |
32 | /* Shared power controls need to be handled carefully */ |
33 | if (platform_scoop_config->power_ctrl) |
34 | platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr); |
35 | else |
36 | write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000); |
37 | |
38 | scoopdev->keep_vs = NO_KEEP_VS; |
39 | scoopdev->keep_rd = 0; |
40 | } |
41 | |
42 | static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
43 | { |
44 | if (SCOOP_DEV[skt->nr].cd_irq >= 0) { |
45 | skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq; |
46 | skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str; |
47 | } |
48 | |
49 | skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq; |
50 | |
51 | return 0; |
52 | } |
53 | |
54 | static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
55 | struct pcmcia_state *state) |
56 | { |
57 | unsigned short cpr, csr; |
58 | struct device *scoop = SCOOP_DEV[skt->nr].dev; |
59 | |
60 | cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR); |
61 | |
62 | write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); |
63 | write_scoop_reg(scoop, SCOOP_ISR, 0x0000); |
64 | write_scoop_reg(scoop, SCOOP_IRM, 0x0000); |
65 | csr = read_scoop_reg(scoop, SCOOP_CSR); |
66 | if (csr & 0x0004) { |
67 | /* card eject */ |
68 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
69 | SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; |
70 | } |
71 | else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) { |
72 | /* keep vs1,vs2 */ |
73 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
74 | csr |= SCOOP_DEV[skt->nr].keep_vs; |
75 | } |
76 | else if (cpr & 0x0003) { |
77 | /* power on */ |
78 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
79 | SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0); |
80 | } |
81 | else { |
82 | /* card detect */ |
83 | if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) { |
84 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
85 | } else { |
86 | write_scoop_reg(scoop, SCOOP_CDR, 0x0002); |
87 | } |
88 | } |
89 | |
90 | state->detect = (csr & 0x0004) ? 0 : 1; |
91 | state->ready = (csr & 0x0002) ? 1 : 0; |
92 | state->bvd1 = (csr & 0x0010) ? 1 : 0; |
93 | state->bvd2 = (csr & 0x0020) ? 1 : 0; |
94 | state->wrprot = (csr & 0x0008) ? 1 : 0; |
95 | state->vs_3v = (csr & 0x0040) ? 0 : 1; |
96 | state->vs_Xv = (csr & 0x0080) ? 0 : 1; |
97 | |
98 | if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { |
99 | printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n" , cpr); |
100 | } |
101 | } |
102 | |
103 | |
104 | static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
105 | const socket_state_t *state) |
106 | { |
107 | unsigned long flags; |
108 | struct device *scoop = SCOOP_DEV[skt->nr].dev; |
109 | |
110 | unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; |
111 | |
112 | switch (state->Vcc) { |
113 | case 0: break; |
114 | case 33: break; |
115 | case 50: break; |
116 | default: |
117 | printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n" , state->Vcc); |
118 | return -1; |
119 | } |
120 | |
121 | if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { |
122 | printk(KERN_ERR "CF slot cannot support Vpp %u\n" , state->Vpp); |
123 | return -1; |
124 | } |
125 | |
126 | local_irq_save(flags); |
127 | |
128 | nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; |
129 | ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; |
130 | nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; |
131 | nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; |
132 | |
133 | if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) { |
134 | ncpr |= (state->Vcc == 33) ? 0x0002 : |
135 | (state->Vcc == 50) ? 0x0002 : 0; |
136 | } else { |
137 | ncpr |= (state->Vcc == 33) ? 0x0001 : |
138 | (state->Vcc == 50) ? 0x0002 : 0; |
139 | } |
140 | nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; |
141 | ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; |
142 | nccr |= (state->flags&SS_RESET)? 0x0080: 0; |
143 | nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| |
144 | ((skt->status&SS_READY) ? 0x0002 : 0)| |
145 | ((skt->status&SS_BATDEAD)? 0x0010 : 0)| |
146 | ((skt->status&SS_BATWARN)? 0x0020 : 0)| |
147 | ((skt->status&SS_STSCHG) ? 0x0010 : 0)| |
148 | ((skt->status&SS_WRPROT) ? 0x0008 : 0); |
149 | |
150 | if (!(ncpr & 0x0003)) { |
151 | SCOOP_DEV[skt->nr].keep_rd = 0; |
152 | } else if (!SCOOP_DEV[skt->nr].keep_rd) { |
153 | if (nccr & 0x0080) |
154 | SCOOP_DEV[skt->nr].keep_rd = 1; |
155 | else |
156 | nccr |= 0x0080; |
157 | } |
158 | |
159 | if (mcr != nmcr) |
160 | write_scoop_reg(scoop, SCOOP_MCR, nmcr); |
161 | if (cpr != ncpr) { |
162 | if (platform_scoop_config->power_ctrl) |
163 | platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr); |
164 | else |
165 | write_scoop_reg(scoop, SCOOP_CPR, ncpr); |
166 | } |
167 | if (ccr != nccr) |
168 | write_scoop_reg(scoop, SCOOP_CCR, nccr); |
169 | if (imr != nimr) |
170 | write_scoop_reg(scoop, SCOOP_IMR, nimr); |
171 | |
172 | local_irq_restore(flags); |
173 | |
174 | return 0; |
175 | } |
176 | |
177 | static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) |
178 | { |
179 | sharpsl_pcmcia_init_reset(skt); |
180 | |
181 | /* Enable interrupt */ |
182 | write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0); |
183 | write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101); |
184 | SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS; |
185 | } |
186 | |
187 | static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) |
188 | { |
189 | sharpsl_pcmcia_init_reset(skt); |
190 | } |
191 | |
192 | static struct pcmcia_low_level sharpsl_pcmcia_ops = { |
193 | .owner = THIS_MODULE, |
194 | .hw_init = sharpsl_pcmcia_hw_init, |
195 | .socket_state = sharpsl_pcmcia_socket_state, |
196 | .configure_socket = sharpsl_pcmcia_configure_socket, |
197 | .socket_init = sharpsl_pcmcia_socket_init, |
198 | .socket_suspend = sharpsl_pcmcia_socket_suspend, |
199 | .first = 0, |
200 | .nr = 0, |
201 | }; |
202 | |
203 | #ifdef CONFIG_SA1100_COLLIE |
204 | #include "sa11xx_base.h" |
205 | |
206 | int pcmcia_collie_init(struct device *dev) |
207 | { |
208 | int ret = -ENODEV; |
209 | |
210 | if (machine_is_collie()) |
211 | ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1); |
212 | |
213 | return ret; |
214 | } |
215 | |
216 | #else |
217 | |
218 | static struct platform_device *sharpsl_pcmcia_device; |
219 | |
220 | static int __init sharpsl_pcmcia_init(void) |
221 | { |
222 | int ret; |
223 | |
224 | if (!platform_scoop_config) |
225 | return -ENODEV; |
226 | |
227 | sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs; |
228 | sharpsl_pcmcia_device = platform_device_alloc(name: "pxa2xx-pcmcia" , id: -1); |
229 | |
230 | if (!sharpsl_pcmcia_device) |
231 | return -ENOMEM; |
232 | |
233 | ret = platform_device_add_data(pdev: sharpsl_pcmcia_device, |
234 | data: &sharpsl_pcmcia_ops, size: sizeof(sharpsl_pcmcia_ops)); |
235 | if (ret == 0) { |
236 | sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev; |
237 | ret = platform_device_add(pdev: sharpsl_pcmcia_device); |
238 | } |
239 | |
240 | if (ret) |
241 | platform_device_put(pdev: sharpsl_pcmcia_device); |
242 | |
243 | return ret; |
244 | } |
245 | |
246 | static void __exit sharpsl_pcmcia_exit(void) |
247 | { |
248 | platform_device_unregister(sharpsl_pcmcia_device); |
249 | } |
250 | |
251 | fs_initcall(sharpsl_pcmcia_init); |
252 | module_exit(sharpsl_pcmcia_exit); |
253 | #endif |
254 | |
255 | MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support" ); |
256 | MODULE_LICENSE("GPL" ); |
257 | MODULE_ALIAS("platform:pxa2xx-pcmcia" ); |
258 | |