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+/*
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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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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 2 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program; if not, write to the Free Software
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+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+
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+*/
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+
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+#include <linux/module.h>
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+#include <linux/moduleparam.h>
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+#include <linux/init.h>
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+
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+#include <asm/io.h>
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+
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+#include "cx88.h"
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+#include "cx88-vp3054-i2c.h"
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+
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+
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+/* ----------------------------------------------------------------------- */
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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->card_priv;
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+
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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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+
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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->card_priv;
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+
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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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+
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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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+
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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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+
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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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+
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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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+/* ----------------------------------------------------------------------- */
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+
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+static 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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+ .mdelay = 10,
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+ .timeout = 200,
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+};
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+
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+/* ----------------------------------------------------------------------- */
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+
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+static struct i2c_adapter vp3054_i2c_adap_template = {
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+ .name = "cx2388x",
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+ .owner = THIS_MODULE,
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+ .id = I2C_HW_B_CX2388x,
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+};
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+
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+static struct i2c_client vp3054_i2c_client_template = {
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+ .name = "VP-3054",
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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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+
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+ if (core->board != CX88_BOARD_DNTV_LIVE_DVB_T_PRO)
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+ return 0;
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+
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+ dev->card_priv = kzalloc(sizeof(*vp3054_i2c), GFP_KERNEL);
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+ if (dev->card_priv == NULL)
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+ return -ENOMEM;
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+ vp3054_i2c = dev->card_priv;
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+
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+ memcpy(&vp3054_i2c->adap, &vp3054_i2c_adap_template,
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+ sizeof(vp3054_i2c->adap));
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+ memcpy(&vp3054_i2c->algo, &vp3054_i2c_algo_template,
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+ sizeof(vp3054_i2c->algo));
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+ memcpy(&vp3054_i2c->client, &vp3054_i2c_client_template,
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+ sizeof(vp3054_i2c->client));
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+
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+ vp3054_i2c->adap.class |= I2C_CLASS_TV_DIGITAL;
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+
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+ vp3054_i2c->adap.dev.parent = &dev->pci->dev;
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+ strlcpy(vp3054_i2c->adap.name, core->name,
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+ sizeof(vp3054_i2c->adap.name));
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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_i2c->client.adapter = &vp3054_i2c->adap;
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+
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+ vp3054_bit_setscl(dev,1);
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+ vp3054_bit_setsda(dev,1);
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+
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+ rc = i2c_bit_add_bus(&vp3054_i2c->adap);
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+ if (0 != rc) {
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+ printk("%s: vp3054_i2c register FAILED\n", core->name);
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+
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+ kfree(dev->card_priv);
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+ dev->card_priv = NULL;
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+ }
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+
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+ return rc;
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+}
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+
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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->card_priv;
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+
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+ if (vp3054_i2c == NULL ||
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+ dev->core->board != CX88_BOARD_DNTV_LIVE_DVB_T_PRO)
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+ return;
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+
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+ i2c_bit_del_bus(&vp3054_i2c->adap);
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+ kfree(vp3054_i2c);
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+}
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+
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+EXPORT_SYMBOL(vp3054_i2c_probe);
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+EXPORT_SYMBOL(vp3054_i2c_remove);
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