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Based on 3 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* cx88-vp3054-i2c.c -- support for the secondary I2C bus of the
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* DNTV Live! DVB-T Pro (VP-3054), wired as:
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* GPIO[0] -> SCL, GPIO[1] -> SDA
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*
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* (c) 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
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*/
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#include "cx88.h"
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#include "cx88-vp3054-i2c.h"
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/io.h>
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MODULE_DESCRIPTION("driver for cx2388x VP3054 design");
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MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
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MODULE_LICENSE("GPL");
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/* ----------------------------------------------------------------------- */
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static void vp3054_bit_setscl(void *data, int state)
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{
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struct cx8802_dev *dev = data;
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struct cx88_core *core = dev->core;
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struct vp3054_i2c_state *vp3054_i2c = dev->vp3054;
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if (state) {
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vp3054_i2c->state |= 0x0001; /* SCL high */
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vp3054_i2c->state &= ~0x0100; /* external pullup */
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} else {
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vp3054_i2c->state &= ~0x0001; /* SCL low */
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vp3054_i2c->state |= 0x0100; /* drive pin */
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}
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cx_write(MO_GP0_IO, 0x010000 | vp3054_i2c->state);
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cx_read(MO_GP0_IO);
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}
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static void vp3054_bit_setsda(void *data, int state)
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{
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struct cx8802_dev *dev = data;
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struct cx88_core *core = dev->core;
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struct vp3054_i2c_state *vp3054_i2c = dev->vp3054;
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if (state) {
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vp3054_i2c->state |= 0x0002; /* SDA high */
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vp3054_i2c->state &= ~0x0200; /* tristate pin */
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} else {
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vp3054_i2c->state &= ~0x0002; /* SDA low */
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vp3054_i2c->state |= 0x0200; /* drive pin */
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}
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cx_write(MO_GP0_IO, 0x020000 | vp3054_i2c->state);
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cx_read(MO_GP0_IO);
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}
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static int vp3054_bit_getscl(void *data)
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{
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struct cx8802_dev *dev = data;
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struct cx88_core *core = dev->core;
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u32 state;
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state = cx_read(MO_GP0_IO);
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return (state & 0x01) ? 1 : 0;
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}
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static int vp3054_bit_getsda(void *data)
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{
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struct cx8802_dev *dev = data;
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struct cx88_core *core = dev->core;
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u32 state;
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state = cx_read(MO_GP0_IO);
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return (state & 0x02) ? 1 : 0;
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}
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/* ----------------------------------------------------------------------- */
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static const struct i2c_algo_bit_data vp3054_i2c_algo_template = {
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.setsda = vp3054_bit_setsda,
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.setscl = vp3054_bit_setscl,
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.getsda = vp3054_bit_getsda,
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.getscl = vp3054_bit_getscl,
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.udelay = 16,
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.timeout = 200,
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};
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/* ----------------------------------------------------------------------- */
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int vp3054_i2c_probe(struct cx8802_dev *dev)
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{
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struct cx88_core *core = dev->core;
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struct vp3054_i2c_state *vp3054_i2c;
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int rc;
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if (core->boardnr != CX88_BOARD_DNTV_LIVE_DVB_T_PRO)
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return 0;
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vp3054_i2c = kzalloc(sizeof(*vp3054_i2c), GFP_KERNEL);
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if (!vp3054_i2c)
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return -ENOMEM;
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dev->vp3054 = vp3054_i2c;
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vp3054_i2c->algo = vp3054_i2c_algo_template;
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vp3054_i2c->adap.dev.parent = &dev->pci->dev;
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strscpy(vp3054_i2c->adap.name, core->name,
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sizeof(vp3054_i2c->adap.name));
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vp3054_i2c->adap.owner = THIS_MODULE;
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vp3054_i2c->algo.data = dev;
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i2c_set_adapdata(&vp3054_i2c->adap, dev);
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vp3054_i2c->adap.algo_data = &vp3054_i2c->algo;
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vp3054_bit_setscl(dev, 1);
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vp3054_bit_setsda(dev, 1);
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rc = i2c_bit_add_bus(&vp3054_i2c->adap);
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if (rc != 0) {
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pr_err("vp3054_i2c register FAILED\n");
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kfree(dev->vp3054);
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dev->vp3054 = NULL;
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}
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return rc;
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}
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EXPORT_SYMBOL(vp3054_i2c_probe);
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void vp3054_i2c_remove(struct cx8802_dev *dev)
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{
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struct vp3054_i2c_state *vp3054_i2c = dev->vp3054;
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if (!vp3054_i2c ||
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dev->core->boardnr != CX88_BOARD_DNTV_LIVE_DVB_T_PRO)
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return;
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i2c_del_adapter(&vp3054_i2c->adap);
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kfree(vp3054_i2c);
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}
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EXPORT_SYMBOL(vp3054_i2c_remove);
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