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345 lines
8.6 KiB
345 lines
8.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* SF16-FMR2 and SF16-FMD2 radio driver for Linux |
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* Copyright (c) 2011 Ondrej Zary |
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* |
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* Original driver was (c) 2000-2002 Ziglio Frediano, [email protected] |
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* but almost nothing remained here after conversion to generic TEA575x |
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* implementation |
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*/ |
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#include <linux/delay.h> |
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#include <linux/module.h> /* Modules */ |
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#include <linux/init.h> /* Initdata */ |
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#include <linux/slab.h> |
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#include <linux/ioport.h> /* request_region */ |
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#include <linux/io.h> /* outb, outb_p */ |
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#include <linux/isa.h> |
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#include <linux/pnp.h> |
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#include <media/drv-intf/tea575x.h> |
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MODULE_AUTHOR("Ondrej Zary"); |
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MODULE_DESCRIPTION("MediaForte SF16-FMR2 and SF16-FMD2 FM radio card driver"); |
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MODULE_LICENSE("GPL"); |
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/* these cards can only use two different ports (0x384 and 0x284) */ |
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#define FMR2_MAX 2 |
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static int radio_nr[FMR2_MAX] = { [0 ... (FMR2_MAX - 1)] = -1 }; |
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module_param_array(radio_nr, int, NULL, 0444); |
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MODULE_PARM_DESC(radio_nr, "Radio device numbers"); |
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struct fmr2 { |
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int io; |
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struct v4l2_device v4l2_dev; |
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struct snd_tea575x tea; |
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struct v4l2_ctrl *volume; |
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struct v4l2_ctrl *balance; |
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bool is_fmd2; |
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}; |
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static int num_fmr2_cards; |
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static struct fmr2 *fmr2_cards[FMR2_MAX]; |
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static bool isa_registered; |
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static bool pnp_registered; |
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/* the port is hardwired on SF16-FMR2 */ |
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#define FMR2_PORT 0x384 |
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/* TEA575x tuner pins */ |
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#define STR_DATA (1 << 0) |
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#define STR_CLK (1 << 1) |
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#define STR_WREN (1 << 2) |
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#define STR_MOST (1 << 3) |
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/* PT2254A/TC9154A volume control pins */ |
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#define PT_ST (1 << 4) |
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#define PT_CK (1 << 5) |
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#define PT_DATA (1 << 6) |
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/* volume control presence pin */ |
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#define FMR2_HASVOL (1 << 7) |
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static void fmr2_tea575x_set_pins(struct snd_tea575x *tea, u8 pins) |
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{ |
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struct fmr2 *fmr2 = tea->private_data; |
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u8 bits = 0; |
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bits |= (pins & TEA575X_DATA) ? STR_DATA : 0; |
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bits |= (pins & TEA575X_CLK) ? STR_CLK : 0; |
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/* WRITE_ENABLE is inverted, DATA must be high during read */ |
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bits |= (pins & TEA575X_WREN) ? 0 : STR_WREN | STR_DATA; |
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outb(bits, fmr2->io); |
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} |
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static u8 fmr2_tea575x_get_pins(struct snd_tea575x *tea) |
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{ |
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struct fmr2 *fmr2 = tea->private_data; |
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u8 bits = inb(fmr2->io); |
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return ((bits & STR_DATA) ? TEA575X_DATA : 0) | |
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((bits & STR_MOST) ? TEA575X_MOST : 0); |
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} |
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static void fmr2_tea575x_set_direction(struct snd_tea575x *tea, bool output) |
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{ |
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} |
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static const struct snd_tea575x_ops fmr2_tea_ops = { |
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.set_pins = fmr2_tea575x_set_pins, |
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.get_pins = fmr2_tea575x_get_pins, |
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.set_direction = fmr2_tea575x_set_direction, |
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}; |
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/* TC9154A/PT2254A volume control */ |
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/* 18-bit shift register bit definitions */ |
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#define TC9154A_ATT_MAJ_0DB (1 << 0) |
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#define TC9154A_ATT_MAJ_10DB (1 << 1) |
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#define TC9154A_ATT_MAJ_20DB (1 << 2) |
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#define TC9154A_ATT_MAJ_30DB (1 << 3) |
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#define TC9154A_ATT_MAJ_40DB (1 << 4) |
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#define TC9154A_ATT_MAJ_50DB (1 << 5) |
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#define TC9154A_ATT_MAJ_60DB (1 << 6) |
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#define TC9154A_ATT_MIN_0DB (1 << 7) |
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#define TC9154A_ATT_MIN_2DB (1 << 8) |
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#define TC9154A_ATT_MIN_4DB (1 << 9) |
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#define TC9154A_ATT_MIN_6DB (1 << 10) |
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#define TC9154A_ATT_MIN_8DB (1 << 11) |
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/* bit 12 is ignored */ |
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#define TC9154A_CHANNEL_LEFT (1 << 13) |
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#define TC9154A_CHANNEL_RIGHT (1 << 14) |
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/* bits 15, 16, 17 must be 0 */ |
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#define TC9154A_ATT_MAJ(x) (1 << x) |
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#define TC9154A_ATT_MIN(x) (1 << (7 + x)) |
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static void tc9154a_set_pins(struct fmr2 *fmr2, u8 pins) |
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{ |
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if (!fmr2->tea.mute) |
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pins |= STR_WREN; |
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outb(pins, fmr2->io); |
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} |
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static void tc9154a_set_attenuation(struct fmr2 *fmr2, int att, u32 channel) |
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{ |
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int i; |
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u32 reg; |
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u8 bit; |
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reg = TC9154A_ATT_MAJ(att / 10) | TC9154A_ATT_MIN((att % 10) / 2); |
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reg |= channel; |
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/* write 18-bit shift register, LSB first */ |
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for (i = 0; i < 18; i++) { |
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bit = reg & (1 << i) ? PT_DATA : 0; |
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tc9154a_set_pins(fmr2, bit); |
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udelay(5); |
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tc9154a_set_pins(fmr2, bit | PT_CK); |
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udelay(5); |
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tc9154a_set_pins(fmr2, bit); |
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} |
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/* latch register data */ |
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udelay(5); |
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tc9154a_set_pins(fmr2, PT_ST); |
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udelay(5); |
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tc9154a_set_pins(fmr2, 0); |
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} |
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static int fmr2_s_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler); |
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struct fmr2 *fmr2 = tea->private_data; |
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int volume, balance, left, right; |
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switch (ctrl->id) { |
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case V4L2_CID_AUDIO_VOLUME: |
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volume = ctrl->val; |
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balance = fmr2->balance->cur.val; |
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break; |
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case V4L2_CID_AUDIO_BALANCE: |
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balance = ctrl->val; |
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volume = fmr2->volume->cur.val; |
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break; |
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default: |
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return -EINVAL; |
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} |
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left = right = volume; |
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if (balance < 0) |
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right = max(0, right + balance); |
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if (balance > 0) |
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left = max(0, left - balance); |
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tc9154a_set_attenuation(fmr2, abs(left - 68), TC9154A_CHANNEL_LEFT); |
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tc9154a_set_attenuation(fmr2, abs(right - 68), TC9154A_CHANNEL_RIGHT); |
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return 0; |
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} |
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static const struct v4l2_ctrl_ops fmr2_ctrl_ops = { |
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.s_ctrl = fmr2_s_ctrl, |
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}; |
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static int fmr2_tea_ext_init(struct snd_tea575x *tea) |
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{ |
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struct fmr2 *fmr2 = tea->private_data; |
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/* FMR2 can have volume control, FMD2 can't (uses SB16 mixer) */ |
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if (!fmr2->is_fmd2 && inb(fmr2->io) & FMR2_HASVOL) { |
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fmr2->volume = v4l2_ctrl_new_std(&tea->ctrl_handler, &fmr2_ctrl_ops, V4L2_CID_AUDIO_VOLUME, 0, 68, 2, 56); |
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fmr2->balance = v4l2_ctrl_new_std(&tea->ctrl_handler, &fmr2_ctrl_ops, V4L2_CID_AUDIO_BALANCE, -68, 68, 2, 0); |
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if (tea->ctrl_handler.error) { |
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printk(KERN_ERR "radio-sf16fmr2: can't initialize controls\n"); |
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return tea->ctrl_handler.error; |
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} |
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} |
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return 0; |
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} |
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static const struct pnp_device_id fmr2_pnp_ids[] = { |
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{ .id = "MFRad13" }, /* tuner subdevice of SF16-FMD2 */ |
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{ .id = "" } |
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}; |
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MODULE_DEVICE_TABLE(pnp, fmr2_pnp_ids); |
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static int fmr2_probe(struct fmr2 *fmr2, struct device *pdev, int io) |
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{ |
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int err, i; |
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char *card_name = fmr2->is_fmd2 ? "SF16-FMD2" : "SF16-FMR2"; |
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/* avoid errors if a card was already registered at given port */ |
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for (i = 0; i < num_fmr2_cards; i++) |
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if (io == fmr2_cards[i]->io) |
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return -EBUSY; |
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strscpy(fmr2->v4l2_dev.name, "radio-sf16fmr2", |
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sizeof(fmr2->v4l2_dev.name)); |
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fmr2->io = io; |
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if (!request_region(fmr2->io, 2, fmr2->v4l2_dev.name)) { |
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printk(KERN_ERR "radio-sf16fmr2: I/O port 0x%x already in use\n", fmr2->io); |
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return -EBUSY; |
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} |
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dev_set_drvdata(pdev, fmr2); |
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err = v4l2_device_register(pdev, &fmr2->v4l2_dev); |
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if (err < 0) { |
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v4l2_err(&fmr2->v4l2_dev, "Could not register v4l2_device\n"); |
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release_region(fmr2->io, 2); |
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return err; |
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} |
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fmr2->tea.v4l2_dev = &fmr2->v4l2_dev; |
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fmr2->tea.private_data = fmr2; |
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fmr2->tea.radio_nr = radio_nr[num_fmr2_cards]; |
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fmr2->tea.ops = &fmr2_tea_ops; |
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fmr2->tea.ext_init = fmr2_tea_ext_init; |
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strscpy(fmr2->tea.card, card_name, sizeof(fmr2->tea.card)); |
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snprintf(fmr2->tea.bus_info, sizeof(fmr2->tea.bus_info), "%s:%s", |
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fmr2->is_fmd2 ? "PnP" : "ISA", dev_name(pdev)); |
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if (snd_tea575x_init(&fmr2->tea, THIS_MODULE)) { |
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printk(KERN_ERR "radio-sf16fmr2: Unable to detect TEA575x tuner\n"); |
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release_region(fmr2->io, 2); |
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return -ENODEV; |
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} |
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printk(KERN_INFO "radio-sf16fmr2: %s radio card at 0x%x.\n", |
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card_name, fmr2->io); |
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return 0; |
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} |
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static int fmr2_isa_match(struct device *pdev, unsigned int ndev) |
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{ |
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struct fmr2 *fmr2 = kzalloc(sizeof(*fmr2), GFP_KERNEL); |
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if (!fmr2) |
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return 0; |
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if (fmr2_probe(fmr2, pdev, FMR2_PORT)) { |
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kfree(fmr2); |
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return 0; |
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} |
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dev_set_drvdata(pdev, fmr2); |
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fmr2_cards[num_fmr2_cards++] = fmr2; |
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return 1; |
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} |
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static int fmr2_pnp_probe(struct pnp_dev *pdev, const struct pnp_device_id *id) |
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{ |
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int ret; |
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struct fmr2 *fmr2 = kzalloc(sizeof(*fmr2), GFP_KERNEL); |
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if (!fmr2) |
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return -ENOMEM; |
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fmr2->is_fmd2 = true; |
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ret = fmr2_probe(fmr2, &pdev->dev, pnp_port_start(pdev, 0)); |
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if (ret) { |
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kfree(fmr2); |
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return ret; |
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} |
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pnp_set_drvdata(pdev, fmr2); |
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fmr2_cards[num_fmr2_cards++] = fmr2; |
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return 0; |
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} |
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static void fmr2_remove(struct fmr2 *fmr2) |
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{ |
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snd_tea575x_exit(&fmr2->tea); |
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release_region(fmr2->io, 2); |
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v4l2_device_unregister(&fmr2->v4l2_dev); |
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kfree(fmr2); |
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} |
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static void fmr2_isa_remove(struct device *pdev, unsigned int ndev) |
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{ |
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fmr2_remove(dev_get_drvdata(pdev)); |
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} |
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static void fmr2_pnp_remove(struct pnp_dev *pdev) |
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{ |
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fmr2_remove(pnp_get_drvdata(pdev)); |
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pnp_set_drvdata(pdev, NULL); |
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} |
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static struct isa_driver fmr2_isa_driver = { |
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.match = fmr2_isa_match, |
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.remove = fmr2_isa_remove, |
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.driver = { |
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.name = "radio-sf16fmr2", |
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}, |
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}; |
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static struct pnp_driver fmr2_pnp_driver = { |
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.name = "radio-sf16fmr2", |
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.id_table = fmr2_pnp_ids, |
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.probe = fmr2_pnp_probe, |
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.remove = fmr2_pnp_remove, |
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}; |
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static int __init fmr2_init(void) |
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{ |
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int ret; |
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ret = pnp_register_driver(&fmr2_pnp_driver); |
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if (!ret) |
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pnp_registered = true; |
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ret = isa_register_driver(&fmr2_isa_driver, 1); |
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if (!ret) |
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isa_registered = true; |
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return (pnp_registered || isa_registered) ? 0 : ret; |
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} |
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static void __exit fmr2_exit(void) |
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{ |
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if (pnp_registered) |
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pnp_unregister_driver(&fmr2_pnp_driver); |
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if (isa_registered) |
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isa_unregister_driver(&fmr2_isa_driver); |
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} |
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module_init(fmr2_init); |
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module_exit(fmr2_exit);
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