1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * drivers/pcmcia/sa1100_h3600.c |
4 | * |
5 | * PCMCIA implementation routines for H3600 |
6 | * |
7 | */ |
8 | #include <linux/module.h> |
9 | #include <linux/kernel.h> |
10 | #include <linux/device.h> |
11 | #include <linux/interrupt.h> |
12 | #include <linux/init.h> |
13 | #include <linux/delay.h> |
14 | #include <linux/gpio.h> |
15 | |
16 | #include <mach/hardware.h> |
17 | #include <asm/irq.h> |
18 | #include <asm/mach-types.h> |
19 | #include <mach/h3xxx.h> |
20 | |
21 | #include "sa1100_generic.h" |
22 | |
23 | static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
24 | { |
25 | int err; |
26 | |
27 | skt->stat[SOC_STAT_CD].name = skt->nr ? "pcmcia1-detect" : "pcmcia0-detect" ; |
28 | skt->stat[SOC_STAT_RDY].name = skt->nr ? "pcmcia1-ready" : "pcmcia0-ready" ; |
29 | |
30 | err = soc_pcmcia_request_gpiods(skt); |
31 | if (err) |
32 | return err; |
33 | |
34 | switch (skt->nr) { |
35 | case 0: |
36 | err = gpio_request(gpio: H3XXX_EGPIO_OPT_NVRAM_ON, label: "OPT NVRAM ON" ); |
37 | if (err) |
38 | goto err01; |
39 | err = gpio_direction_output(gpio: H3XXX_EGPIO_OPT_NVRAM_ON, value: 0); |
40 | if (err) |
41 | goto err03; |
42 | err = gpio_request(gpio: H3XXX_EGPIO_OPT_ON, label: "OPT ON" ); |
43 | if (err) |
44 | goto err03; |
45 | err = gpio_direction_output(gpio: H3XXX_EGPIO_OPT_ON, value: 0); |
46 | if (err) |
47 | goto err04; |
48 | err = gpio_request(gpio: H3XXX_EGPIO_OPT_RESET, label: "OPT RESET" ); |
49 | if (err) |
50 | goto err04; |
51 | err = gpio_direction_output(gpio: H3XXX_EGPIO_OPT_RESET, value: 0); |
52 | if (err) |
53 | goto err05; |
54 | err = gpio_request(gpio: H3XXX_EGPIO_CARD_RESET, label: "PCMCIA CARD RESET" ); |
55 | if (err) |
56 | goto err05; |
57 | err = gpio_direction_output(gpio: H3XXX_EGPIO_CARD_RESET, value: 0); |
58 | if (err) |
59 | goto err06; |
60 | break; |
61 | case 1: |
62 | break; |
63 | } |
64 | return 0; |
65 | |
66 | err06: gpio_free(gpio: H3XXX_EGPIO_CARD_RESET); |
67 | err05: gpio_free(gpio: H3XXX_EGPIO_OPT_RESET); |
68 | err04: gpio_free(gpio: H3XXX_EGPIO_OPT_ON); |
69 | err03: gpio_free(gpio: H3XXX_EGPIO_OPT_NVRAM_ON); |
70 | err01: gpio_free(gpio: H3XXX_GPIO_PCMCIA_IRQ0); |
71 | return err; |
72 | } |
73 | |
74 | static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
75 | { |
76 | switch (skt->nr) { |
77 | case 0: |
78 | /* Disable CF bus: */ |
79 | gpio_set_value(gpio: H3XXX_EGPIO_OPT_NVRAM_ON, value: 0); |
80 | gpio_set_value(gpio: H3XXX_EGPIO_OPT_ON, value: 0); |
81 | gpio_set_value(gpio: H3XXX_EGPIO_OPT_RESET, value: 1); |
82 | |
83 | gpio_free(gpio: H3XXX_EGPIO_CARD_RESET); |
84 | gpio_free(gpio: H3XXX_EGPIO_OPT_RESET); |
85 | gpio_free(gpio: H3XXX_EGPIO_OPT_ON); |
86 | gpio_free(gpio: H3XXX_EGPIO_OPT_NVRAM_ON); |
87 | break; |
88 | case 1: |
89 | break; |
90 | } |
91 | } |
92 | |
93 | static void |
94 | h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state) |
95 | { |
96 | state->bvd1 = 0; |
97 | state->bvd2 = 0; |
98 | state->vs_3v = 0; |
99 | state->vs_Xv = 0; |
100 | } |
101 | |
102 | static int |
103 | h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) |
104 | { |
105 | if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) { |
106 | printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n" , |
107 | state->Vcc / 10, state->Vcc % 10); |
108 | return -1; |
109 | } |
110 | |
111 | gpio_set_value(gpio: H3XXX_EGPIO_CARD_RESET, value: !!(state->flags & SS_RESET)); |
112 | |
113 | /* Silently ignore Vpp, output enable, speaker enable. */ |
114 | |
115 | return 0; |
116 | } |
117 | |
118 | static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt) |
119 | { |
120 | /* Enable CF bus: */ |
121 | gpio_set_value(gpio: H3XXX_EGPIO_OPT_NVRAM_ON, value: 1); |
122 | gpio_set_value(gpio: H3XXX_EGPIO_OPT_ON, value: 1); |
123 | gpio_set_value(gpio: H3XXX_EGPIO_OPT_RESET, value: 0); |
124 | |
125 | msleep(msecs: 10); |
126 | } |
127 | |
128 | static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) |
129 | { |
130 | /* |
131 | * FIXME: This doesn't fit well. We don't have the mechanism in |
132 | * the generic PCMCIA layer to deal with the idea of two sockets |
133 | * on one bus. We rely on the cs.c behaviour shutting down |
134 | * socket 0 then socket 1. |
135 | */ |
136 | if (skt->nr == 1) { |
137 | gpio_set_value(gpio: H3XXX_EGPIO_OPT_ON, value: 0); |
138 | gpio_set_value(gpio: H3XXX_EGPIO_OPT_NVRAM_ON, value: 0); |
139 | /* hmm, does this suck power? */ |
140 | gpio_set_value(gpio: H3XXX_EGPIO_OPT_RESET, value: 1); |
141 | } |
142 | } |
143 | |
144 | struct pcmcia_low_level h3600_pcmcia_ops = { |
145 | .owner = THIS_MODULE, |
146 | .hw_init = h3600_pcmcia_hw_init, |
147 | .hw_shutdown = h3600_pcmcia_hw_shutdown, |
148 | .socket_state = h3600_pcmcia_socket_state, |
149 | .configure_socket = h3600_pcmcia_configure_socket, |
150 | |
151 | .socket_init = h3600_pcmcia_socket_init, |
152 | .socket_suspend = h3600_pcmcia_socket_suspend, |
153 | }; |
154 | |
155 | int pcmcia_h3600_init(struct device *dev) |
156 | { |
157 | int ret = -ENODEV; |
158 | |
159 | if (machine_is_h3600()) |
160 | ret = sa11xx_drv_pcmcia_probe(dev, ops: &h3600_pcmcia_ops, first: 0, nr: 2); |
161 | |
162 | return ret; |
163 | } |
164 | |