net/wan/slic_ds26522.c

16 #include <linux/spi/spi.h>
38 static void slic_write(struct spi_device *spi, u16 addr,
49 	/* write spi addr and value */
50 	spi_write(spi, &temp[0], SLIC_THREE_LEN);
53 static u8 slic_read(struct spi_device *spi, u16 addr)
62 	spi_write_then_read(spi, &temp[0], SLIC_TWO_LEN, &data,
69 static bool get_slic_product_code(struct spi_device *spi)
73 	device_id = slic_read(spi, DS26522_IDR_ADDR);
80 static void ds26522_e1_spec_config(struct spi_device *spi)
83 	slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_E1);
86 	slic_write(spi, DS26522_TMMR_ADDR, DS26522_TMMR_E1);
89 	slic_write(spi, DS26522_RMMR_ADDR,
90 		   slic_read(spi, DS26522_RMMR_ADDR) | DS26522_RMMR_FRM_EN);
93 	slic_write(spi, DS26522_TMMR_ADDR,
94 		   slic_read(spi, DS26522_TMMR_ADDR) | DS26522_TMMR_FRM_EN);
97 	slic_write(spi, DS26522_RCR1_ADDR,
101 	slic_write(spi, DS26522_RIOCR_ADDR,
105 	slic_write(spi, DS26522_TCR1_ADDR, DS26522_TCR1_TB8ZS);
108 	slic_write(spi, DS26522_TIOCR_ADDR,
112 	slic_write(spi, DS26522_E1TAF_ADDR, DS26522_E1TAF_DEFAULT);
115 	slic_write(spi, DS26522_E1TNAF_ADDR, DS26522_E1TNAF_DEFAULT);
118 	slic_write(spi, DS26522_RMMR_ADDR, slic_read(spi, DS26522_RMMR_ADDR) |
122 	slic_write(spi, DS26522_TMMR_ADDR, slic_read(spi, DS26522_TMMR_ADDR) |
126 	slic_write(spi, DS26522_LTRCR_ADDR, DS26522_LTRCR_E1);
129 	slic_write(spi, DS26522_LTITSR_ADDR,
133 	slic_write(spi, DS26522_LRISMR_ADDR,
137 	slic_write(spi, DS26522_LMCR_ADDR, DS26522_LMCR_TE);
140 static int slic_ds26522_init_configure(struct spi_device *spi)
145 	slic_write(spi, DS26522_GTCCR_ADDR, DS26522_GTCCR_BPREFSEL_REFCLKIN |
148 	slic_write(spi, DS26522_GTCR2_ADDR, DS26522_GTCR2_TSSYNCOUT);
149 	slic_write(spi, DS26522_GFCR_ADDR, DS26522_GFCR_BPCLK_2048KHZ);
152 	slic_write(spi, DS26522_GTCR1_ADDR, DS26522_GTCR1);
155 	slic_write(spi, DS26522_GLSRR_ADDR, DS26522_GLSRR_RESET);
158 	slic_write(spi, DS26522_GFSRR_ADDR, DS26522_GFSRR_RESET);
162 	slic_write(spi, DS26522_GLSRR_ADDR, DS26522_GLSRR_NORMAL);
163 	slic_write(spi, DS26522_GFSRR_ADDR, DS26522_GFSRR_NORMAL);
166 	slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_SFTRST);
169 	slic_write(spi, DS26522_TMMR_ADDR, DS26522_TMMR_SFTRST);
176 		slic_write(spi, addr, 0);
180 		slic_write(spi, addr, 0);
184 		slic_write(spi, addr, 0);
188 		slic_write(spi, addr, 0);
191 	ds26522_e1_spec_config(spi);
193 	slic_write(spi, DS26522_GTCR1_ADDR, 0x00);
198 static void slic_ds26522_remove(struct spi_device *spi)
203 static int slic_ds26522_probe(struct spi_device *spi)
207 	g_spi = spi;
208 	spi->bits_per_word = 8;
210 	if (!get_slic_product_code(spi))
213 	ret = slic_ds26522_init_configure(spi);
215 		pr_info("DS26522 cs%d configured\n", spi_get_chipselect(spi, 0));
224 MODULE_DEVICE_TABLE(spi, slic_ds26522_id);