16 #include <linux/spi/spi.h>
37 static void slic_write(struct spi_device *spi, u16 addr,  in slic_write()  argument
48 	/* write spi addr and value */  in slic_write()
49 	spi_write(spi, &temp[0], SLIC_THREE_LEN);  in slic_write()
52 static u8 slic_read(struct spi_device *spi, u16 addr)  in slic_read()  argument
61 	spi_write_then_read(spi, &temp[0], SLIC_TWO_LEN, &data,  in slic_read()
68 static bool get_slic_product_code(struct spi_device *spi)  in get_slic_product_code()  argument
72 	device_id = slic_read(spi, DS26522_IDR_ADDR);  in get_slic_product_code()
79 static void ds26522_e1_spec_config(struct spi_device *spi)  in ds26522_e1_spec_config()  argument
82 	slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_E1);  in ds26522_e1_spec_config()
85 	slic_write(spi, DS26522_TMMR_ADDR, DS26522_TMMR_E1);  in ds26522_e1_spec_config()
88 	slic_write(spi, DS26522_RMMR_ADDR,  in ds26522_e1_spec_config()
89 		   slic_read(spi, DS26522_RMMR_ADDR) | DS26522_RMMR_FRM_EN);  in ds26522_e1_spec_config()
92 	slic_write(spi, DS26522_TMMR_ADDR,  in ds26522_e1_spec_config()
93 		   slic_read(spi, DS26522_TMMR_ADDR) | DS26522_TMMR_FRM_EN);  in ds26522_e1_spec_config()
96 	slic_write(spi, DS26522_RCR1_ADDR,  in ds26522_e1_spec_config()
100 	slic_write(spi, DS26522_RIOCR_ADDR,  in ds26522_e1_spec_config()
104 	slic_write(spi, DS26522_TCR1_ADDR, DS26522_TCR1_TB8ZS);  in ds26522_e1_spec_config()
107 	slic_write(spi, DS26522_TIOCR_ADDR,  in ds26522_e1_spec_config()
111 	slic_write(spi, DS26522_E1TAF_ADDR, DS26522_E1TAF_DEFAULT);  in ds26522_e1_spec_config()
114 	slic_write(spi, DS26522_E1TNAF_ADDR, DS26522_E1TNAF_DEFAULT);  in ds26522_e1_spec_config()
117 	slic_write(spi, DS26522_RMMR_ADDR, slic_read(spi, DS26522_RMMR_ADDR) |  in ds26522_e1_spec_config()
121 	slic_write(spi, DS26522_TMMR_ADDR, slic_read(spi, DS26522_TMMR_ADDR) |  in ds26522_e1_spec_config()
125 	slic_write(spi, DS26522_LTRCR_ADDR, DS26522_LTRCR_E1);  in ds26522_e1_spec_config()
128 	slic_write(spi, DS26522_LTITSR_ADDR,  in ds26522_e1_spec_config()
132 	slic_write(spi, DS26522_LRISMR_ADDR,  in ds26522_e1_spec_config()
136 	slic_write(spi, DS26522_LMCR_ADDR, DS26522_LMCR_TE);  in ds26522_e1_spec_config()
139 static int slic_ds26522_init_configure(struct spi_device *spi)  in slic_ds26522_init_configure()  argument
144 	slic_write(spi, DS26522_GTCCR_ADDR, DS26522_GTCCR_BPREFSEL_REFCLKIN |  in slic_ds26522_init_configure()
147 	slic_write(spi, DS26522_GTCR2_ADDR, DS26522_GTCR2_TSSYNCOUT);  in slic_ds26522_init_configure()
148 	slic_write(spi, DS26522_GFCR_ADDR, DS26522_GFCR_BPCLK_2048KHZ);  in slic_ds26522_init_configure()
151 	slic_write(spi, DS26522_GTCR1_ADDR, DS26522_GTCR1);  in slic_ds26522_init_configure()
154 	slic_write(spi, DS26522_GLSRR_ADDR, DS26522_GLSRR_RESET);  in slic_ds26522_init_configure()
157 	slic_write(spi, DS26522_GFSRR_ADDR, DS26522_GFSRR_RESET);  in slic_ds26522_init_configure()
161 	slic_write(spi, DS26522_GLSRR_ADDR, DS26522_GLSRR_NORMAL);  in slic_ds26522_init_configure()
162 	slic_write(spi, DS26522_GFSRR_ADDR, DS26522_GFSRR_NORMAL);  in slic_ds26522_init_configure()
165 	slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_SFTRST);  in slic_ds26522_init_configure()
168 	slic_write(spi, DS26522_TMMR_ADDR, DS26522_TMMR_SFTRST);  in slic_ds26522_init_configure()
175 		slic_write(spi, addr, 0);  in slic_ds26522_init_configure()
179 		slic_write(spi, addr, 0);  in slic_ds26522_init_configure()
183 		slic_write(spi, addr, 0);  in slic_ds26522_init_configure()
187 		slic_write(spi, addr, 0);  in slic_ds26522_init_configure()
190 	ds26522_e1_spec_config(spi);  in slic_ds26522_init_configure()
192 	slic_write(spi, DS26522_GTCR1_ADDR, 0x00);  in slic_ds26522_init_configure()
197 static int slic_ds26522_remove(struct spi_device *spi)  in slic_ds26522_remove()  argument
203 static int slic_ds26522_probe(struct spi_device *spi)  in slic_ds26522_probe()  argument
207 	g_spi = spi;  in slic_ds26522_probe()
208 	spi->bits_per_word = 8;  in slic_ds26522_probe()
210 	if (!get_slic_product_code(spi))  in slic_ds26522_probe()
213 	ret = slic_ds26522_init_configure(spi);  in slic_ds26522_probe()
215 		pr_info("DS26522 cs%d configured\n", spi->chip_select);  in slic_ds26522_probe()
224 MODULE_DEVICE_TABLE(spi, slic_ds26522_id);