2  * B53 register access through SPI
4  * Copyright (C) 2011-2013 Jonas Gorski <jogo@openwrt.org>
24 #include <linux/spi/spi.h>
42 static inline int b53_spi_read_reg(struct spi_device *spi, u8 reg, u8 *val,  in b53_spi_read_reg()  argument
50 	return spi_write_then_read(spi, txbuf, 2, val, len);  in b53_spi_read_reg()
53 static inline int b53_spi_clear_status(struct spi_device *spi)  in b53_spi_clear_status()  argument
60 		ret = b53_spi_read_reg(spi, B53_SPI_STATUS, &rxbuf, 1);  in b53_spi_clear_status()
71 		return -EIO;  in b53_spi_clear_status()
76 static inline int b53_spi_set_page(struct spi_device *spi, u8 page)  in b53_spi_set_page()  argument
84 	return spi_write(spi, txbuf, sizeof(txbuf));  in b53_spi_set_page()
87 static inline int b53_prepare_reg_access(struct spi_device *spi, u8 page)  in b53_prepare_reg_access()  argument
89 	int ret = b53_spi_clear_status(spi);  in b53_prepare_reg_access()
94 	return b53_spi_set_page(spi, page);  in b53_prepare_reg_access()
97 static int b53_spi_prepare_reg_read(struct spi_device *spi, u8 reg)  in b53_spi_prepare_reg_read()  argument
103 	ret = b53_spi_read_reg(spi, reg, &rxbuf, 1);  in b53_spi_prepare_reg_read()
108 		ret = b53_spi_read_reg(spi, B53_SPI_STATUS, &rxbuf, 1);  in b53_spi_prepare_reg_read()
119 		return -EIO;  in b53_spi_prepare_reg_read()
127 	struct spi_device *spi = dev->priv;  in b53_spi_read()  local
130 	ret = b53_prepare_reg_access(spi, page);  in b53_spi_read()
134 	ret = b53_spi_prepare_reg_read(spi, reg);  in b53_spi_read()
138 	return b53_spi_read_reg(spi, B53_SPI_DATA, data, len);  in b53_spi_read()
200 	struct spi_device *spi = dev->priv;  in b53_spi_write8()  local
204 	ret = b53_prepare_reg_access(spi, page);  in b53_spi_write8()
212 	return spi_write(spi, txbuf, sizeof(txbuf));  in b53_spi_write8()
217 	struct spi_device *spi = dev->priv;  in b53_spi_write16()  local
221 	ret = b53_prepare_reg_access(spi, page);  in b53_spi_write16()
229 	return spi_write(spi, txbuf, sizeof(txbuf));  in b53_spi_write16()
234 	struct spi_device *spi = dev->priv;  in b53_spi_write32()  local
238 	ret = b53_prepare_reg_access(spi, page);  in b53_spi_write32()
246 	return spi_write(spi, txbuf, sizeof(txbuf));  in b53_spi_write32()
251 	struct spi_device *spi = dev->priv;  in b53_spi_write48()  local
255 	ret = b53_prepare_reg_access(spi, page);  in b53_spi_write48()
263 	return spi_write(spi, txbuf, sizeof(txbuf) - 2);  in b53_spi_write48()
268 	struct spi_device *spi = dev->priv;  in b53_spi_write64()  local
272 	ret = b53_prepare_reg_access(spi, page);  in b53_spi_write64()
280 	return spi_write(spi, txbuf, sizeof(txbuf));  in b53_spi_write64()
296 static int b53_spi_probe(struct spi_device *spi)  in b53_spi_probe()  argument
301 	dev = b53_switch_alloc(&spi->dev, &b53_spi_ops, spi);  in b53_spi_probe()
303 		return -ENOMEM;  in b53_spi_probe()
305 	if (spi->dev.platform_data)  in b53_spi_probe()
306 		dev->pdata = spi->dev.platform_data;  in b53_spi_probe()
312 	spi_set_drvdata(spi, dev);  in b53_spi_probe()
317 static void b53_spi_remove(struct spi_device *spi)  in b53_spi_remove()  argument
319 	struct b53_device *dev = spi_get_drvdata(spi);  in b53_spi_remove()
325 static void b53_spi_shutdown(struct spi_device *spi)  in b53_spi_shutdown()  argument
327 	struct b53_device *dev = spi_get_drvdata(spi);  in b53_spi_shutdown()
332 	spi_set_drvdata(spi, NULL);  in b53_spi_shutdown()
336 	{ .compatible = "brcm,bcm5325" },
337 	{ .compatible = "brcm,bcm5365" },
338 	{ .compatible = "brcm,bcm5395" },
339 	{ .compatible = "brcm,bcm5397" },
340 	{ .compatible = "brcm,bcm5398" },
341 	{ .compatible = "brcm,bcm53115" },
342 	{ .compatible = "brcm,bcm53125" },
343 	{ .compatible = "brcm,bcm53128" },
359 MODULE_DEVICE_TABLE(spi, b53_spi_ids);
363 		.name	= "b53-switch",
375 MODULE_DESCRIPTION("B53 SPI access driver");