--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Sharp QM1D1B0004 satellite tuner
+ *
+ * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
+ *
+ * based on (former) drivers/media/pci/pt1/va1j5jf8007s.c.
+ */
+
+/*
+ * Note:
+ * Since the data-sheet of this tuner chip is not available,
+ * this driver lacks some tuner_ops and config options.
+ * In addition, the implementation might be dependent on the specific use
+ * in the FE module: VA1J5JF8007S and/or in the product: Earthsoft PT1/PT2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <media/dvb_frontend.h>
+#include "qm1d1b0004.h"
+
+/*
+ * Tuner I/F (copied from the former va1j5jf8007s.c)
+ * b[0] I2C addr
+ * b[1] "0":1, BG:2, divider_quotient[7:3]:5
+ * b[2] divider_quotient[2:0]:3, divider_remainder:5
+ * b[3] "111":3, LPF[3:2]:2, TM:1, "0":1, REF:1
+ * b[4] BANDX, PSC:1, LPF[1:0]:2, DIV:1, "0":1
+ *
+ * PLL frequency step :=
+ * REF == 0 -> PLL XTL frequency(4MHz) / 8
+ * REF == 1 -> PLL XTL frequency(4MHz) / 4
+ *
+ * PreScaler :=
+ * PSC == 0 -> x32
+ * PSC == 1 -> x16
+ *
+ * divider_quotient := (frequency / PLL frequency step) / PreScaler
+ * divider_remainder := (frequency / PLL frequency step) % PreScaler
+ *
+ * LPF := LPF Frequency / 1000 / 2 - 2
+ * LPF Frequency @ baudrate=28.86Mbps = 30000
+ *
+ * band (1..9)
+ * band 1 (freq < 986000) -> DIV:1, BANDX:5, PSC:1
+ * band 2 (freq < 1072000) -> DIV:1, BANDX:6, PSC:1
+ * band 3 (freq < 1154000) -> DIV:1, BANDX:7, PSC:0
+ * band 4 (freq < 1291000) -> DIV:0, BANDX:1, PSC:0
+ * band 5 (freq < 1447000) -> DIV:0, BANDX:2, PSC:0
+ * band 6 (freq < 1615000) -> DIV:0, BANDX:3, PSC:0
+ * band 7 (freq < 1791000) -> DIV:0, BANDX:4, PSC:0
+ * band 8 (freq < 1972000) -> DIV:0, BANDX:5, PSC:0
+ * band 9 (freq < 2150000) -> DIV:0, BANDX:6, PSC:0
+ */
+
+#define QM1D1B0004_PSC_MASK (1 << 4)
+
+#define QM1D1B0004_XTL_FREQ 4000
+#define QM1D1B0004_LPF_FALLBACK 30000
+
+static const struct qm1d1b0004_config default_cfg = {
+ .lpf_freq = QM1D1B0004_CFG_LPF_DFLT,
+ .half_step = false,
+};
+
+struct qm1d1b0004_state {
+ struct qm1d1b0004_config cfg;
+ struct i2c_client *i2c;
+};
+
+
+struct qm1d1b0004_cb_map {
+ u32 frequency;
+ u8 cb;
+};
+
+static const struct qm1d1b0004_cb_map cb_maps[] = {
+ { 986000, 0xb2 },
+ { 1072000, 0xd2 },
+ { 1154000, 0xe2 },
+ { 1291000, 0x20 },
+ { 1447000, 0x40 },
+ { 1615000, 0x60 },
+ { 1791000, 0x80 },
+ { 1972000, 0xa0 },
+};
+
+static u8 lookup_cb(u32 frequency)
+{
+ int i;
+ const struct qm1d1b0004_cb_map *map;
+
+ for (i = 0; i < ARRAY_SIZE(cb_maps); i++) {
+ map = &cb_maps[i];
+ if (frequency < map->frequency)
+ return map->cb;
+ }
+ return 0xc0;
+}
+
+static int qm1d1b0004_set_params(struct dvb_frontend *fe)
+{
+ struct qm1d1b0004_state *state;
+ u32 frequency, pll, lpf_freq;
+ u16 word;
+ u8 buf[4], cb, lpf;
+ int ret;
+
+ state = fe->tuner_priv;
+ frequency = fe->dtv_property_cache.frequency;
+
+ pll = QM1D1B0004_XTL_FREQ / 4;
+ if (state->cfg.half_step)
+ pll /= 2;
+ word = DIV_ROUND_CLOSEST(frequency, pll);
+ cb = lookup_cb(frequency);
+ if (cb & QM1D1B0004_PSC_MASK)
+ word = (word << 1 & ~0x1f) | (word & 0x0f);
+
+ /* step.1: set frequency with BG:2, TM:0(4MHZ), LPF:4MHz */
+ buf[0] = 0x40 | word >> 8;
+ buf[1] = word;
+ /* inconsisnten with the above I/F doc. maybe the doc is wrong */
+ buf[2] = 0xe0 | state->cfg.half_step;
+ buf[3] = cb;
+ ret = i2c_master_send(state->i2c, buf, 4);
+ if (ret < 0)
+ return ret;
+
+ /* step.2: set TM:1 */
+ buf[0] = 0xe4 | state->cfg.half_step;
+ ret = i2c_master_send(state->i2c, buf, 1);
+ if (ret < 0)
+ return ret;
+ msleep(20);
+
+ /* step.3: set LPF */
+ lpf_freq = state->cfg.lpf_freq;
+ if (lpf_freq == QM1D1B0004_CFG_LPF_DFLT)
+ lpf_freq = fe->dtv_property_cache.symbol_rate / 1000;
+ if (lpf_freq == 0)
+ lpf_freq = QM1D1B0004_LPF_FALLBACK;
+ lpf = DIV_ROUND_UP(lpf_freq, 2000) - 2;
+ buf[0] = 0xe4 | ((lpf & 0x0c) << 1) | state->cfg.half_step;
+ buf[1] = cb | ((lpf & 0x03) << 2);
+ ret = i2c_master_send(state->i2c, buf, 2);
+ if (ret < 0)
+ return ret;
+
+ /* step.4: read PLL lock? */
+ buf[0] = 0;
+ ret = i2c_master_recv(state->i2c, buf, 1);
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+
+static int qm1d1b0004_set_config(struct dvb_frontend *fe, void *priv_cfg)
+{
+ struct qm1d1b0004_state *state;
+
+ state = fe->tuner_priv;
+ memcpy(&state->cfg, priv_cfg, sizeof(state->cfg));
+ return 0;
+}
+
+
+static int qm1d1b0004_init(struct dvb_frontend *fe)
+{
+ struct qm1d1b0004_state *state;
+ u8 buf[2] = {0xf8, 0x04};
+
+ state = fe->tuner_priv;
+ if (state->cfg.half_step)
+ buf[0] |= 0x01;
+
+ return i2c_master_send(state->i2c, buf, 2);
+}
+
+
+static const struct dvb_tuner_ops qm1d1b0004_ops = {
+ .info = {
+ .name = "Sharp qm1d1b0004",
+
+ .frequency_min = 950000,
+ .frequency_max = 2150000,
+ },
+
+ .init = qm1d1b0004_init,
+
+ .set_params = qm1d1b0004_set_params,
+ .set_config = qm1d1b0004_set_config,
+};
+
+static int
+qm1d1b0004_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct dvb_frontend *fe;
+ struct qm1d1b0004_config *cfg;
+ struct qm1d1b0004_state *state;
+ int ret;
+
+ cfg = client->dev.platform_data;
+ fe = cfg->fe;
+ i2c_set_clientdata(client, fe);
+
+ fe->tuner_priv = kzalloc(sizeof(struct qm1d1b0004_state), GFP_KERNEL);
+ if (!fe->tuner_priv) {
+ ret = -ENOMEM;
+ goto err_mem;
+ }
+
+ memcpy(&fe->ops.tuner_ops, &qm1d1b0004_ops, sizeof(fe->ops.tuner_ops));
+
+ state = fe->tuner_priv;
+ state->i2c = client;
+ ret = qm1d1b0004_set_config(fe, cfg);
+ if (ret != 0)
+ goto err_priv;
+
+ dev_info(&client->dev, "Sharp QM1D1B0004 attached.\n");
+ return 0;
+
+err_priv:
+ kfree(fe->tuner_priv);
+err_mem:
+ fe->tuner_priv = NULL;
+ return ret;
+}
+
+static int qm1d1b0004_remove(struct i2c_client *client)
+{
+ struct dvb_frontend *fe;
+
+ fe = i2c_get_clientdata(client);
+ kfree(fe->tuner_priv);
+ fe->tuner_priv = NULL;
+ return 0;
+}
+
+
+static const struct i2c_device_id qm1d1b0004_id[] = {
+ {"qm1d1b0004", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, qm1d1b0004_id);
+
+static struct i2c_driver qm1d1b0004_driver = {
+ .driver = {
+ .name = "qm1d1b0004",
+ },
+ .probe = qm1d1b0004_probe,
+ .remove = qm1d1b0004_remove,
+ .id_table = qm1d1b0004_id,
+};
+
+module_i2c_driver(qm1d1b0004_driver);
+
+MODULE_DESCRIPTION("Sharp QM1D1B0004");
+MODULE_AUTHOR("Akihiro Tsukada");
+MODULE_LICENSE("GPL");
projects / openwrt / staging / blogic.git / commitdiff