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e82c60ae DT |
1 | /* |
2 | * lpc_sch.c - LPC interface for Intel Poulsbo SCH | |
3 | * | |
4 | * LPC bridge function of the Intel SCH contains many other | |
5 | * functional units, such as Interrupt controllers, Timers, | |
6 | * Power Management, System Management, GPIO, RTC, and LPC | |
7 | * Configuration Registers. | |
8 | * | |
9 | * Copyright (c) 2010 CompuLab Ltd | |
10 | * Author: Denis Turischev <denis@compulab.co.il> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License 2 as published | |
14 | * by the Free Software Foundation. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; see the file COPYING. If not, write to | |
23 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
26 | #include <linux/init.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/errno.h> | |
30 | #include <linux/acpi.h> | |
31 | #include <linux/pci.h> | |
32 | #include <linux/mfd/core.h> | |
33 | ||
34 | #define SMBASE 0x40 | |
35 | #define SMBUS_IO_SIZE 64 | |
36 | ||
37 | #define GPIOBASE 0x44 | |
38 | #define GPIO_IO_SIZE 64 | |
8ee3c2a7 | 39 | #define GPIO_IO_SIZE_CENTERTON 128 |
e82c60ae | 40 | |
19921ef6 AS |
41 | #define WDTBASE 0x84 |
42 | #define WDT_IO_SIZE 64 | |
43 | ||
e82c60ae DT |
44 | static struct resource smbus_sch_resource = { |
45 | .flags = IORESOURCE_IO, | |
46 | }; | |
47 | ||
48 | ||
49 | static struct resource gpio_sch_resource = { | |
50 | .flags = IORESOURCE_IO, | |
51 | }; | |
52 | ||
53 | static struct mfd_cell lpc_sch_cells[] = { | |
54 | { | |
55 | .name = "isch_smbus", | |
56 | .num_resources = 1, | |
57 | .resources = &smbus_sch_resource, | |
58 | }, | |
59 | { | |
60 | .name = "sch_gpio", | |
61 | .num_resources = 1, | |
62 | .resources = &gpio_sch_resource, | |
63 | }, | |
64 | }; | |
65 | ||
19921ef6 AS |
66 | static struct resource wdt_sch_resource = { |
67 | .flags = IORESOURCE_IO, | |
68 | }; | |
69 | ||
70 | static struct mfd_cell tunnelcreek_cells[] = { | |
71 | { | |
805b237a | 72 | .name = "ie6xx_wdt", |
19921ef6 AS |
73 | .num_resources = 1, |
74 | .resources = &wdt_sch_resource, | |
75 | }, | |
76 | }; | |
77 | ||
61485c63 | 78 | static DEFINE_PCI_DEVICE_TABLE(lpc_sch_ids) = { |
e82c60ae | 79 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC) }, |
e967f77d | 80 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ITC_LPC) }, |
8ee3c2a7 | 81 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CENTERTON_ILB) }, |
e82c60ae DT |
82 | { 0, } |
83 | }; | |
84 | MODULE_DEVICE_TABLE(pci, lpc_sch_ids); | |
85 | ||
f791be49 | 86 | static int lpc_sch_probe(struct pci_dev *dev, |
e82c60ae DT |
87 | const struct pci_device_id *id) |
88 | { | |
89 | unsigned int base_addr_cfg; | |
90 | unsigned short base_addr; | |
e967f77d | 91 | int i; |
19921ef6 | 92 | int ret; |
e82c60ae DT |
93 | |
94 | pci_read_config_dword(dev, SMBASE, &base_addr_cfg); | |
95 | if (!(base_addr_cfg & (1 << 31))) { | |
96 | dev_err(&dev->dev, "Decode of the SMBus I/O range disabled\n"); | |
97 | return -ENODEV; | |
98 | } | |
99 | base_addr = (unsigned short)base_addr_cfg; | |
100 | if (base_addr == 0) { | |
101 | dev_err(&dev->dev, "I/O space for SMBus uninitialized\n"); | |
102 | return -ENODEV; | |
103 | } | |
104 | ||
105 | smbus_sch_resource.start = base_addr; | |
106 | smbus_sch_resource.end = base_addr + SMBUS_IO_SIZE - 1; | |
107 | ||
108 | pci_read_config_dword(dev, GPIOBASE, &base_addr_cfg); | |
109 | if (!(base_addr_cfg & (1 << 31))) { | |
110 | dev_err(&dev->dev, "Decode of the GPIO I/O range disabled\n"); | |
111 | return -ENODEV; | |
112 | } | |
113 | base_addr = (unsigned short)base_addr_cfg; | |
114 | if (base_addr == 0) { | |
115 | dev_err(&dev->dev, "I/O space for GPIO uninitialized\n"); | |
116 | return -ENODEV; | |
117 | } | |
118 | ||
119 | gpio_sch_resource.start = base_addr; | |
8ee3c2a7 SH |
120 | |
121 | if (id->device == PCI_DEVICE_ID_INTEL_CENTERTON_ILB) | |
122 | gpio_sch_resource.end = base_addr + GPIO_IO_SIZE_CENTERTON - 1; | |
123 | else | |
124 | gpio_sch_resource.end = base_addr + GPIO_IO_SIZE - 1; | |
e82c60ae | 125 | |
e967f77d DT |
126 | for (i=0; i < ARRAY_SIZE(lpc_sch_cells); i++) |
127 | lpc_sch_cells[i].id = id->device; | |
128 | ||
19921ef6 | 129 | ret = mfd_add_devices(&dev->dev, 0, |
0848c94f MB |
130 | lpc_sch_cells, ARRAY_SIZE(lpc_sch_cells), NULL, |
131 | 0, NULL); | |
19921ef6 AS |
132 | if (ret) |
133 | goto out_dev; | |
134 | ||
8ee3c2a7 SH |
135 | if (id->device == PCI_DEVICE_ID_INTEL_ITC_LPC |
136 | || id->device == PCI_DEVICE_ID_INTEL_CENTERTON_ILB) { | |
19921ef6 AS |
137 | pci_read_config_dword(dev, WDTBASE, &base_addr_cfg); |
138 | if (!(base_addr_cfg & (1 << 31))) { | |
139 | dev_err(&dev->dev, "Decode of the WDT I/O range disabled\n"); | |
140 | ret = -ENODEV; | |
141 | goto out_dev; | |
142 | } | |
143 | base_addr = (unsigned short)base_addr_cfg; | |
144 | if (base_addr == 0) { | |
145 | dev_err(&dev->dev, "I/O space for WDT uninitialized\n"); | |
146 | ret = -ENODEV; | |
147 | goto out_dev; | |
148 | } | |
149 | ||
150 | wdt_sch_resource.start = base_addr; | |
151 | wdt_sch_resource.end = base_addr + WDT_IO_SIZE - 1; | |
152 | ||
153 | for (i = 0; i < ARRAY_SIZE(tunnelcreek_cells); i++) | |
154 | tunnelcreek_cells[i].id = id->device; | |
155 | ||
156 | ret = mfd_add_devices(&dev->dev, 0, tunnelcreek_cells, | |
0848c94f MB |
157 | ARRAY_SIZE(tunnelcreek_cells), NULL, |
158 | 0, NULL); | |
19921ef6 AS |
159 | } |
160 | ||
161 | return ret; | |
162 | out_dev: | |
163 | mfd_remove_devices(&dev->dev); | |
164 | return ret; | |
e82c60ae DT |
165 | } |
166 | ||
167 | static void __devexit lpc_sch_remove(struct pci_dev *dev) | |
168 | { | |
169 | mfd_remove_devices(&dev->dev); | |
170 | } | |
171 | ||
172 | static struct pci_driver lpc_sch_driver = { | |
173 | .name = "lpc_sch", | |
174 | .id_table = lpc_sch_ids, | |
175 | .probe = lpc_sch_probe, | |
84449216 | 176 | .remove = lpc_sch_remove, |
e82c60ae DT |
177 | }; |
178 | ||
38a36f5a | 179 | module_pci_driver(lpc_sch_driver); |
e82c60ae DT |
180 | |
181 | MODULE_AUTHOR("Denis Turischev <denis@compulab.co.il>"); | |
182 | MODULE_DESCRIPTION("LPC interface for Intel Poulsbo SCH"); | |
183 | MODULE_LICENSE("GPL"); |