2 * linux/drivers/pinctrl/pinctrl-pxa3xx.c
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * publishhed by the Free Software Foundation.
8 * Copyright (C) 2011, Marvell Technology Group Ltd.
10 * Author: Haojian Zhuang <haojian.zhuang@marvell.com>
14 #include <linux/err.h>
15 #include <linux/module.h>
16 #include <linux/device.h>
18 #include <linux/platform_device.h>
19 #include <linux/slab.h>
20 #include "pinctrl-pxa3xx.h"
22 static struct pinctrl_gpio_range pxa3xx_pinctrl_gpio_range
= {
23 .name
= "PXA3xx GPIO",
29 static int pxa3xx_get_groups_count(struct pinctrl_dev
*pctrldev
)
31 struct pxa3xx_pinmux_info
*info
= pinctrl_dev_get_drvdata(pctrldev
);
33 return info
->num_grps
;
36 static const char *pxa3xx_get_group_name(struct pinctrl_dev
*pctrldev
,
39 struct pxa3xx_pinmux_info
*info
= pinctrl_dev_get_drvdata(pctrldev
);
41 return info
->grps
[selector
].name
;
44 static int pxa3xx_get_group_pins(struct pinctrl_dev
*pctrldev
,
46 const unsigned **pins
,
49 struct pxa3xx_pinmux_info
*info
= pinctrl_dev_get_drvdata(pctrldev
);
51 *pins
= info
->grps
[selector
].pins
;
52 *num_pins
= info
->grps
[selector
].npins
;
56 static struct pinctrl_ops pxa3xx_pctrl_ops
= {
57 .get_groups_count
= pxa3xx_get_groups_count
,
58 .get_group_name
= pxa3xx_get_group_name
,
59 .get_group_pins
= pxa3xx_get_group_pins
,
62 static int pxa3xx_pmx_get_funcs_count(struct pinctrl_dev
*pctrldev
)
64 struct pxa3xx_pinmux_info
*info
= pinctrl_dev_get_drvdata(pctrldev
);
66 return info
->num_funcs
;
69 static const char *pxa3xx_pmx_get_func_name(struct pinctrl_dev
*pctrldev
,
72 struct pxa3xx_pinmux_info
*info
= pinctrl_dev_get_drvdata(pctrldev
);
73 return info
->funcs
[func
].name
;
76 static int pxa3xx_pmx_get_groups(struct pinctrl_dev
*pctrldev
, unsigned func
,
77 const char * const **groups
,
78 unsigned * const num_groups
)
80 struct pxa3xx_pinmux_info
*info
= pinctrl_dev_get_drvdata(pctrldev
);
81 *groups
= info
->funcs
[func
].groups
;
82 *num_groups
= info
->funcs
[func
].num_groups
;
86 /* Return function number. If failure, return negative value. */
87 static int match_mux(struct pxa3xx_mfp_pin
*mfp
, unsigned mux
)
90 for (i
= 0; i
< PXA3xx_MAX_MUX
; i
++) {
91 if (mfp
->func
[i
] == mux
)
94 if (i
>= PXA3xx_MAX_MUX
)
99 /* check whether current pin configuration is valid. Negative for failure */
100 static int match_group_mux(struct pxa3xx_pin_group
*grp
,
101 struct pxa3xx_pinmux_info
*info
,
105 for (i
= 0; i
< grp
->npins
; i
++) {
107 ret
= match_mux(&info
->mfp
[pin
], mux
);
109 dev_err(info
->dev
, "Can't find mux %d on pin%d\n",
117 static int pxa3xx_pmx_enable(struct pinctrl_dev
*pctrldev
, unsigned func
,
120 struct pxa3xx_pinmux_info
*info
= pinctrl_dev_get_drvdata(pctrldev
);
121 struct pxa3xx_pin_group
*pin_grp
= &info
->grps
[group
];
123 int i
, mfpr
, pin
, pin_func
;
125 if (!pin_grp
->npins
||
126 (match_group_mux(pin_grp
, info
, pin_grp
->mux
) < 0)) {
127 dev_err(info
->dev
, "Failed to set the pin group: %d\n", group
);
130 for (i
= 0; i
< pin_grp
->npins
; i
++) {
131 pin
= pin_grp
->pins
[i
];
132 pin_func
= match_mux(&info
->mfp
[pin
], pin_grp
->mux
);
133 mfpr
= info
->mfp
[pin
].mfpr
;
134 data
= readl_relaxed(info
->virt_base
+ mfpr
);
135 data
&= ~MFPR_FUNC_MASK
;
137 writel_relaxed(data
, info
->virt_base
+ mfpr
);
142 static int pxa3xx_pmx_request_gpio(struct pinctrl_dev
*pctrldev
,
143 struct pinctrl_gpio_range
*range
,
146 struct pxa3xx_pinmux_info
*info
= pinctrl_dev_get_drvdata(pctrldev
);
150 pin_func
= match_mux(&info
->mfp
[pin
], PXA3xx_MUX_GPIO
);
152 dev_err(info
->dev
, "No GPIO function on pin%d (%s)\n",
153 pin
, info
->pads
[pin
].name
);
156 mfpr
= info
->mfp
[pin
].mfpr
;
157 /* write gpio function into mfpr register */
158 data
= readl_relaxed(info
->virt_base
+ mfpr
) & ~MFPR_FUNC_MASK
;
160 writel_relaxed(data
, info
->virt_base
+ mfpr
);
164 static struct pinmux_ops pxa3xx_pmx_ops
= {
165 .get_functions_count
= pxa3xx_pmx_get_funcs_count
,
166 .get_function_name
= pxa3xx_pmx_get_func_name
,
167 .get_function_groups
= pxa3xx_pmx_get_groups
,
168 .enable
= pxa3xx_pmx_enable
,
169 .gpio_request_enable
= pxa3xx_pmx_request_gpio
,
172 int pxa3xx_pinctrl_register(struct platform_device
*pdev
,
173 struct pxa3xx_pinmux_info
*info
)
175 struct pinctrl_desc
*desc
;
176 struct resource
*res
;
178 if (!info
|| !info
->cputype
)
181 desc
->pins
= info
->pads
;
182 desc
->npins
= info
->num_pads
;
183 desc
->pctlops
= &pxa3xx_pctrl_ops
;
184 desc
->pmxops
= &pxa3xx_pmx_ops
;
185 info
->dev
= &pdev
->dev
;
186 pxa3xx_pinctrl_gpio_range
.npins
= info
->num_gpio
;
188 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
191 info
->virt_base
= devm_ioremap_resource(&pdev
->dev
, res
);
192 if (IS_ERR(info
->virt_base
))
193 return PTR_ERR(info
->virt_base
);
194 info
->pctrl
= pinctrl_register(desc
, &pdev
->dev
, info
);
196 dev_err(&pdev
->dev
, "failed to register PXA pinmux driver\n");
199 pinctrl_add_gpio_range(info
->pctrl
, &pxa3xx_pinctrl_gpio_range
);
200 platform_set_drvdata(pdev
, info
);
204 int pxa3xx_pinctrl_unregister(struct platform_device
*pdev
)
206 struct pxa3xx_pinmux_info
*info
= platform_get_drvdata(pdev
);
208 pinctrl_unregister(info
->pctrl
);
209 platform_set_drvdata(pdev
, NULL
);
213 static int __init
pxa3xx_pinctrl_init(void)
215 pr_info("pxa3xx-pinctrl: PXA3xx pinctrl driver initializing\n");
218 core_initcall_sync(pxa3xx_pinctrl_init
);
220 static void __exit
pxa3xx_pinctrl_exit(void)
223 module_exit(pxa3xx_pinctrl_exit
);
225 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
226 MODULE_DESCRIPTION("PXA3xx pin control driver");
227 MODULE_LICENSE("GPL v2");