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14#include <linux/device.h>
15#include <linux/string.h>
16#include <linux/slab.h>
17#include <linux/platform_device.h>
18#include <linux/io.h>
19#include <asm/gpio.h>
20#include <asm/hardware/scoop.h>
21
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30
31struct scoop_pcmcia_config *platform_scoop_config;
32EXPORT_SYMBOL(platform_scoop_config);
33
34struct scoop_dev {
35 void __iomem *base;
36 struct gpio_chip gpio;
37 spinlock_t scoop_lock;
38 unsigned short suspend_clr;
39 unsigned short suspend_set;
40 u32 scoop_gpwr;
41};
42
43void reset_scoop(struct device *dev)
44{
45 struct scoop_dev *sdev = dev_get_drvdata(dev);
46
47 iowrite16(0x0100, sdev->base + SCOOP_MCR);
48 iowrite16(0x0000, sdev->base + SCOOP_CDR);
49 iowrite16(0x0000, sdev->base + SCOOP_CCR);
50 iowrite16(0x0000, sdev->base + SCOOP_IMR);
51 iowrite16(0x00FF, sdev->base + SCOOP_IRM);
52 iowrite16(0x0000, sdev->base + SCOOP_ISR);
53 iowrite16(0x0000, sdev->base + SCOOP_IRM);
54}
55
56static void __scoop_gpio_set(struct scoop_dev *sdev,
57 unsigned offset, int value)
58{
59 unsigned short gpwr;
60
61 gpwr = ioread16(sdev->base + SCOOP_GPWR);
62 if (value)
63 gpwr |= 1 << (offset + 1);
64 else
65 gpwr &= ~(1 << (offset + 1));
66 iowrite16(gpwr, sdev->base + SCOOP_GPWR);
67}
68
69static void scoop_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
70{
71 struct scoop_dev *sdev = container_of(chip, struct scoop_dev, gpio);
72 unsigned long flags;
73
74 spin_lock_irqsave(&sdev->scoop_lock, flags);
75
76 __scoop_gpio_set(sdev, offset, value);
77
78 spin_unlock_irqrestore(&sdev->scoop_lock, flags);
79}
80
81static int scoop_gpio_get(struct gpio_chip *chip, unsigned offset)
82{
83 struct scoop_dev *sdev = container_of(chip, struct scoop_dev, gpio);
84
85
86 return ioread16(sdev->base + SCOOP_GPRR) & (1 << (offset + 1));
87}
88
89static int scoop_gpio_direction_input(struct gpio_chip *chip,
90 unsigned offset)
91{
92 struct scoop_dev *sdev = container_of(chip, struct scoop_dev, gpio);
93 unsigned long flags;
94 unsigned short gpcr;
95
96 spin_lock_irqsave(&sdev->scoop_lock, flags);
97
98 gpcr = ioread16(sdev->base + SCOOP_GPCR);
99 gpcr &= ~(1 << (offset + 1));
100 iowrite16(gpcr, sdev->base + SCOOP_GPCR);
101
102 spin_unlock_irqrestore(&sdev->scoop_lock, flags);
103
104 return 0;
105}
106
107static int scoop_gpio_direction_output(struct gpio_chip *chip,
108 unsigned offset, int value)
109{
110 struct scoop_dev *sdev = container_of(chip, struct scoop_dev, gpio);
111 unsigned long flags;
112 unsigned short gpcr;
113
114 spin_lock_irqsave(&sdev->scoop_lock, flags);
115
116 __scoop_gpio_set(sdev, offset, value);
117
118 gpcr = ioread16(sdev->base + SCOOP_GPCR);
119 gpcr |= 1 << (offset + 1);
120 iowrite16(gpcr, sdev->base + SCOOP_GPCR);
121
122 spin_unlock_irqrestore(&sdev->scoop_lock, flags);
123
124 return 0;
125}
126
127unsigned short read_scoop_reg(struct device *dev, unsigned short reg)
128{
129 struct scoop_dev *sdev = dev_get_drvdata(dev);
130 return ioread16(sdev->base + reg);
131}
132
133void write_scoop_reg(struct device *dev, unsigned short reg, unsigned short data)
134{
135 struct scoop_dev *sdev = dev_get_drvdata(dev);
136 iowrite16(data, sdev->base + reg);
137}
138
139EXPORT_SYMBOL(reset_scoop);
140EXPORT_SYMBOL(read_scoop_reg);
141EXPORT_SYMBOL(write_scoop_reg);
142
143static void check_scoop_reg(struct scoop_dev *sdev)
144{
145 unsigned short mcr;
146
147 mcr = ioread16(sdev->base + SCOOP_MCR);
148 if ((mcr & 0x100) == 0)
149 iowrite16(0x0101, sdev->base + SCOOP_MCR);
150}
151
152#ifdef CONFIG_PM
153static int scoop_suspend(struct platform_device *dev, pm_message_t state)
154{
155 struct scoop_dev *sdev = platform_get_drvdata(dev);
156
157 check_scoop_reg(sdev);
158 sdev->scoop_gpwr = ioread16(sdev->base + SCOOP_GPWR);
159 iowrite16((sdev->scoop_gpwr & ~sdev->suspend_clr) | sdev->suspend_set, sdev->base + SCOOP_GPWR);
160
161 return 0;
162}
163
164static int scoop_resume(struct platform_device *dev)
165{
166 struct scoop_dev *sdev = platform_get_drvdata(dev);
167
168 check_scoop_reg(sdev);
169 iowrite16(sdev->scoop_gpwr, sdev->base + SCOOP_GPWR);
170
171 return 0;
172}
173#else
174#define scoop_suspend NULL
175#define scoop_resume NULL
176#endif
177
178static int __devinit scoop_probe(struct platform_device *pdev)
179{
180 struct scoop_dev *devptr;
181 struct scoop_config *inf;
182 struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
183 int ret;
184 int temp;
185
186 if (!mem)
187 return -EINVAL;
188
189 devptr = kzalloc(sizeof(struct scoop_dev), GFP_KERNEL);
190 if (!devptr)
191 return -ENOMEM;
192
193 spin_lock_init(&devptr->scoop_lock);
194
195 inf = pdev->dev.platform_data;
196 devptr->base = ioremap(mem->start, mem->end - mem->start + 1);
197
198 if (!devptr->base) {
199 ret = -ENOMEM;
200 goto err_ioremap;
201 }
202
203 platform_set_drvdata(pdev, devptr);
204
205 printk("Sharp Scoop Device found at 0x%08x -> 0x%8p\n",(unsigned int)mem->start, devptr->base);
206
207 iowrite16(0x0140, devptr->base + SCOOP_MCR);
208 reset_scoop(&pdev->dev);
209 iowrite16(0x0000, devptr->base + SCOOP_CPR);
210 iowrite16(inf->io_dir & 0xffff, devptr->base + SCOOP_GPCR);
211 iowrite16(inf->io_out & 0xffff, devptr->base + SCOOP_GPWR);
212
213 devptr->suspend_clr = inf->suspend_clr;
214 devptr->suspend_set = inf->suspend_set;
215
216 devptr->gpio.base = -1;
217
218 if (inf->gpio_base != 0) {
219 devptr->gpio.label = dev_name(&pdev->dev);
220 devptr->gpio.base = inf->gpio_base;
221 devptr->gpio.ngpio = 12;
222 devptr->gpio.set = scoop_gpio_set;
223 devptr->gpio.get = scoop_gpio_get;
224 devptr->gpio.direction_input = scoop_gpio_direction_input;
225 devptr->gpio.direction_output = scoop_gpio_direction_output;
226
227 ret = gpiochip_add(&devptr->gpio);
228 if (ret)
229 goto err_gpio;
230 }
231
232 return 0;
233
234 if (devptr->gpio.base != -1)
235 temp = gpiochip_remove(&devptr->gpio);
236err_gpio:
237 platform_set_drvdata(pdev, NULL);
238err_ioremap:
239 iounmap(devptr->base);
240 kfree(devptr);
241
242 return ret;
243}
244
245static int __devexit scoop_remove(struct platform_device *pdev)
246{
247 struct scoop_dev *sdev = platform_get_drvdata(pdev);
248 int ret;
249
250 if (!sdev)
251 return -EINVAL;
252
253 if (sdev->gpio.base != -1) {
254 ret = gpiochip_remove(&sdev->gpio);
255 if (ret) {
256 dev_err(&pdev->dev, "Can't remove gpio chip: %d\n", ret);
257 return ret;
258 }
259 }
260
261 platform_set_drvdata(pdev, NULL);
262 iounmap(sdev->base);
263 kfree(sdev);
264
265 return 0;
266}
267
268static struct platform_driver scoop_driver = {
269 .probe = scoop_probe,
270 .remove = __devexit_p(scoop_remove),
271 .suspend = scoop_suspend,
272 .resume = scoop_resume,
273 .driver = {
274 .name = "sharp-scoop",
275 },
276};
277
278static int __init scoop_init(void)
279{
280 return platform_driver_register(&scoop_driver);
281}
282
283subsys_initcall(scoop_init);
284