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1da177e4 LT |
1 | /* |
2 | * linux/drivers/pcmcia/sa1100_neponset.c | |
3 | * | |
4 | * Neponset PCMCIA specific routines | |
5 | */ | |
6 | #include <linux/module.h> | |
7 | #include <linux/kernel.h> | |
1da177e4 LT |
8 | #include <linux/device.h> |
9 | #include <linux/errno.h> | |
10 | #include <linux/init.h> | |
11 | ||
be509729 | 12 | #include <asm/arch/hardware.h> |
1da177e4 LT |
13 | #include <asm/mach-types.h> |
14 | #include <asm/arch/neponset.h> | |
15 | #include <asm/hardware/sa1111.h> | |
16 | ||
17 | #include "sa1111_generic.h" | |
18 | ||
19 | /* | |
20 | * Neponset uses the Maxim MAX1600, with the following connections: | |
21 | * | |
22 | * MAX1600 Neponset | |
23 | * | |
24 | * A0VCC SA-1111 GPIO A<1> | |
25 | * A1VCC SA-1111 GPIO A<0> | |
26 | * A0VPP CPLD NCR A0VPP | |
27 | * A1VPP CPLD NCR A1VPP | |
28 | * B0VCC SA-1111 GPIO A<2> | |
29 | * B1VCC SA-1111 GPIO A<3> | |
30 | * B0VPP ground (slot B is CF) | |
31 | * B1VPP ground (slot B is CF) | |
32 | * | |
33 | * VX VCC (5V) | |
34 | * VY VCC3_3 (3.3V) | |
35 | * 12INA 12V | |
36 | * 12INB ground (slot B is CF) | |
37 | * | |
38 | * The MAX1600 CODE pin is tied to ground, placing the device in | |
39 | * "Standard Intel code" mode. Refer to the Maxim data sheet for | |
40 | * the corresponding truth table. | |
41 | */ | |
42 | ||
43 | static int | |
44 | neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) | |
45 | { | |
46 | unsigned int ncr_mask, ncr_set, pa_dwr_mask, pa_dwr_set; | |
47 | int ret; | |
48 | ||
49 | switch (skt->nr) { | |
50 | case 0: | |
51 | pa_dwr_mask = GPIO_A0 | GPIO_A1; | |
52 | ncr_mask = NCR_A0VPP | NCR_A1VPP; | |
53 | ||
54 | if (state->Vpp == 0) | |
55 | ncr_set = 0; | |
56 | else if (state->Vpp == 120) | |
57 | ncr_set = NCR_A1VPP; | |
58 | else if (state->Vpp == state->Vcc) | |
59 | ncr_set = NCR_A0VPP; | |
60 | else { | |
61 | printk(KERN_ERR "%s(): unrecognized VPP %u\n", | |
2e11cb4c | 62 | __func__, state->Vpp); |
1da177e4 LT |
63 | return -1; |
64 | } | |
65 | break; | |
66 | ||
67 | case 1: | |
68 | pa_dwr_mask = GPIO_A2 | GPIO_A3; | |
69 | ncr_mask = 0; | |
70 | ncr_set = 0; | |
71 | ||
72 | if (state->Vpp != state->Vcc && state->Vpp != 0) { | |
73 | printk(KERN_ERR "%s(): CF slot cannot support VPP %u\n", | |
2e11cb4c | 74 | __func__, state->Vpp); |
1da177e4 LT |
75 | return -1; |
76 | } | |
77 | break; | |
78 | ||
79 | default: | |
80 | return -1; | |
81 | } | |
82 | ||
83 | /* | |
84 | * pa_dwr_set is the mask for selecting Vcc on both sockets. | |
85 | * pa_dwr_mask selects which bits (and therefore socket) we change. | |
86 | */ | |
87 | switch (state->Vcc) { | |
88 | default: | |
89 | case 0: pa_dwr_set = 0; break; | |
90 | case 33: pa_dwr_set = GPIO_A1|GPIO_A2; break; | |
91 | case 50: pa_dwr_set = GPIO_A0|GPIO_A3; break; | |
92 | } | |
93 | ||
94 | ret = sa1111_pcmcia_configure_socket(skt, state); | |
95 | if (ret == 0) { | |
96 | unsigned long flags; | |
97 | ||
98 | local_irq_save(flags); | |
99 | NCR_0 = (NCR_0 & ~ncr_mask) | ncr_set; | |
100 | ||
101 | local_irq_restore(flags); | |
102 | sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set); | |
103 | } | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | static void neponset_pcmcia_socket_init(struct soc_pcmcia_socket *skt) | |
109 | { | |
110 | if (skt->nr == 0) | |
111 | NCR_0 &= ~(NCR_A0VPP | NCR_A1VPP); | |
112 | ||
113 | sa1111_pcmcia_socket_init(skt); | |
114 | } | |
115 | ||
116 | static struct pcmcia_low_level neponset_pcmcia_ops = { | |
117 | .owner = THIS_MODULE, | |
118 | .hw_init = sa1111_pcmcia_hw_init, | |
119 | .hw_shutdown = sa1111_pcmcia_hw_shutdown, | |
120 | .socket_state = sa1111_pcmcia_socket_state, | |
121 | .configure_socket = neponset_pcmcia_configure_socket, | |
122 | .socket_init = neponset_pcmcia_socket_init, | |
123 | .socket_suspend = sa1111_pcmcia_socket_suspend, | |
124 | }; | |
125 | ||
126 | int __init pcmcia_neponset_init(struct sa1111_dev *sadev) | |
127 | { | |
128 | int ret = -ENODEV; | |
129 | ||
130 | if (machine_is_assabet()) { | |
131 | /* | |
132 | * Set GPIO_A<3:0> to be outputs for the MAX1600, | |
133 | * and switch to standby mode. | |
134 | */ | |
135 | sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0); | |
136 | sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); | |
137 | sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); | |
138 | ret = sa11xx_drv_pcmcia_probe(&sadev->dev, &neponset_pcmcia_ops, 0, 2); | |
139 | } | |
140 | ||
141 | return ret; | |
142 | } |