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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* netup_unidvb_ci.c
*
* DVB CAM support for NetUP Universal Dual DVB-CI
*
* Copyright (C) 2014 NetUP Inc.
* Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
* Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kmod.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include "netup_unidvb.h"
/* CI slot 0 base address */
#define CAM0_CONFIG 0x0
#define CAM0_IO 0x8000
#define CAM0_MEM 0x10000
#define CAM0_SZ 32
/* CI slot 1 base address */
#define CAM1_CONFIG 0x20000
#define CAM1_IO 0x28000
#define CAM1_MEM 0x30000
#define CAM1_SZ 32
/* ctrlstat registers */
#define CAM_CTRLSTAT_READ_SET 0x4980
#define CAM_CTRLSTAT_CLR 0x4982
/* register bits */
#define BIT_CAM_STCHG (1<<0)
#define BIT_CAM_PRESENT (1<<1)
#define BIT_CAM_RESET (1<<2)
#define BIT_CAM_BYPASS (1<<3)
#define BIT_CAM_READY (1<<4)
#define BIT_CAM_ERROR (1<<5)
#define BIT_CAM_OVERCURR (1<<6)
/* BIT_CAM_BYPASS bit shift for SLOT 1 */
#define CAM1_SHIFT 8
irqreturn_t netup_ci_interrupt(struct netup_unidvb_dev *ndev)
{
writew(0x101, ndev->bmmio0 + CAM_CTRLSTAT_CLR);
return IRQ_HANDLED;
}
static int netup_unidvb_ci_slot_ts_ctl(struct dvb_ca_en50221 *en50221,
int slot)
{
struct netup_ci_state *state = en50221->data;
struct netup_unidvb_dev *dev = state->dev;
u16 shift = (state->nr == 1) ? CAM1_SHIFT : 0;
dev_dbg(&dev->pci_dev->dev, "%s(): CAM_CTRLSTAT=0x%x\n",
__func__, readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET));
if (slot != 0)
return -EINVAL;
/* pass data to CAM module */
writew(BIT_CAM_BYPASS << shift, dev->bmmio0 + CAM_CTRLSTAT_CLR);
dev_dbg(&dev->pci_dev->dev, "%s(): CAM_CTRLSTAT=0x%x done\n",
__func__, readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET));
return 0;
}
static int netup_unidvb_ci_slot_shutdown(struct dvb_ca_en50221 *en50221,
int slot)
{
struct netup_ci_state *state = en50221->data;
struct netup_unidvb_dev *dev = state->dev;
dev_dbg(&dev->pci_dev->dev, "%s()\n", __func__);
return 0;
}
static int netup_unidvb_ci_slot_reset(struct dvb_ca_en50221 *en50221,
int slot)
{
struct netup_ci_state *state = en50221->data;
struct netup_unidvb_dev *dev = state->dev;
unsigned long timeout = 0;
u16 shift = (state->nr == 1) ? CAM1_SHIFT : 0;
u16 ci_stat = 0;
int reset_counter = 3;
dev_dbg(&dev->pci_dev->dev, "%s(): CAM_CTRLSTAT_READ_SET=0x%x\n",
__func__, readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET));
reset:
timeout = jiffies + msecs_to_jiffies(5000);
/* start reset */
writew(BIT_CAM_RESET << shift, dev->bmmio0 + CAM_CTRLSTAT_READ_SET);
dev_dbg(&dev->pci_dev->dev, "%s(): waiting for reset\n", __func__);
/* wait until reset done */
while (time_before(jiffies, timeout)) {
ci_stat = readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET);
if (ci_stat & (BIT_CAM_READY << shift))
break;
udelay(1000);
}
if (!(ci_stat & (BIT_CAM_READY << shift)) && reset_counter > 0) {
dev_dbg(&dev->pci_dev->dev,
"%s(): CAMP reset timeout! Will try again..\n",
__func__);
reset_counter--;
goto reset;
}
return 0;
}
static int netup_unidvb_poll_ci_slot_status(struct dvb_ca_en50221 *en50221,
int slot, int open)
{
struct netup_ci_state *state = en50221->data;
struct netup_unidvb_dev *dev = state->dev;
u16 shift = (state->nr == 1) ? CAM1_SHIFT : 0;
u16 ci_stat = 0;
dev_dbg(&dev->pci_dev->dev, "%s(): CAM_CTRLSTAT_READ_SET=0x%x\n",
__func__, readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET));
ci_stat = readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET);
if (ci_stat & (BIT_CAM_READY << shift)) {
state->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
DVB_CA_EN50221_POLL_CAM_READY;
} else if (ci_stat & (BIT_CAM_PRESENT << shift)) {
state->status = DVB_CA_EN50221_POLL_CAM_PRESENT;
} else {
state->status = 0;
}
return state->status;
}
static int netup_unidvb_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
int slot, int addr)
{
struct netup_ci_state *state = en50221->data;
struct netup_unidvb_dev *dev = state->dev;
u8 val = *((u8 __force *)state->membase8_config + addr);
dev_dbg(&dev->pci_dev->dev,
"%s(): addr=0x%x val=0x%x\n", __func__, addr, val);
return val;
}
static int netup_unidvb_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
int slot, int addr, u8 data)
{
struct netup_ci_state *state = en50221->data;
struct netup_unidvb_dev *dev = state->dev;
dev_dbg(&dev->pci_dev->dev,
"%s(): addr=0x%x data=0x%x\n", __func__, addr, data);
*((u8 __force *)state->membase8_config + addr) = data;
return 0;
}
static int netup_unidvb_ci_read_cam_ctl(struct dvb_ca_en50221 *en50221,
int slot, u8 addr)
{
struct netup_ci_state *state = en50221->data;
struct netup_unidvb_dev *dev = state->dev;
u8 val = *((u8 __force *)state->membase8_io + addr);
dev_dbg(&dev->pci_dev->dev,
"%s(): addr=0x%x val=0x%x\n", __func__, addr, val);
return val;
}
static int netup_unidvb_ci_write_cam_ctl(struct dvb_ca_en50221 *en50221,
int slot, u8 addr, u8 data)
{
struct netup_ci_state *state = en50221->data;
struct netup_unidvb_dev *dev = state->dev;
dev_dbg(&dev->pci_dev->dev,
"%s(): addr=0x%x data=0x%x\n", __func__, addr, data);
*((u8 __force *)state->membase8_io + addr) = data;
return 0;
}
int netup_unidvb_ci_register(struct netup_unidvb_dev *dev,
int num, struct pci_dev *pci_dev)
{
int result;
struct netup_ci_state *state;
if (num < 0 || num > 1) {
dev_err(&pci_dev->dev, "%s(): invalid CI adapter %d\n",
__func__, num);
return -EINVAL;
}
state = &dev->ci[num];
state->nr = num;
state->membase8_config = dev->bmmio1 +
((num == 0) ? CAM0_CONFIG : CAM1_CONFIG);
state->membase8_io = dev->bmmio1 +
((num == 0) ? CAM0_IO : CAM1_IO);
state->dev = dev;
state->ca.owner = THIS_MODULE;
state->ca.read_attribute_mem = netup_unidvb_ci_read_attribute_mem;
state->ca.write_attribute_mem = netup_unidvb_ci_write_attribute_mem;
state->ca.read_cam_control = netup_unidvb_ci_read_cam_ctl;
state->ca.write_cam_control = netup_unidvb_ci_write_cam_ctl;
state->ca.slot_reset = netup_unidvb_ci_slot_reset;
state->ca.slot_shutdown = netup_unidvb_ci_slot_shutdown;
state->ca.slot_ts_enable = netup_unidvb_ci_slot_ts_ctl;
state->ca.poll_slot_status = netup_unidvb_poll_ci_slot_status;
state->ca.data = state;
result = dvb_ca_en50221_init(&dev->frontends[num].adapter,
&state->ca, 0, 1);
if (result < 0) {
dev_err(&pci_dev->dev,
"%s(): dvb_ca_en50221_init result %d\n",
__func__, result);
return result;
}
writew(NETUP_UNIDVB_IRQ_CI, dev->bmmio0 + REG_IMASK_SET);
dev_info(&pci_dev->dev,
"%s(): CI adapter %d init done\n", __func__, num);
return 0;
}
void netup_unidvb_ci_unregister(struct netup_unidvb_dev *dev, int num)
{
struct netup_ci_state *state;
dev_dbg(&dev->pci_dev->dev, "%s()\n", __func__);
if (num < 0 || num > 1) {
dev_err(&dev->pci_dev->dev, "%s(): invalid CI adapter %d\n",
__func__, num);
return;
}
state = &dev->ci[num];
dvb_ca_en50221_release(&state->ca);
}
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