Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / tty / serial / cpm_uart / cpm_uart_cpm1.c

diff --git a/kernel/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c b/kernel/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c
new file mode 100644 (file)
index 0000000..6d3b22e
--- /dev/null
+++ b/kernel/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c
@@ -0,0 +1,136 @@
+/*
+ *  Driver for CPM (SCC/SMC) serial ports; CPM1 definitions
+ *
+ *  Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2)
+ *              Pantelis Antoniou (panto@intracom.gr) (CPM1)
+ *
+ *  Copyright (C) 2004 Freescale Semiconductor, Inc.
+ *            (C) 2004 Intracom, S.A.
+ *            (C) 2006 MontaVista Software, Inc.
+ *             Vitaly Bordug <vbordug@ru.mvista.com>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/tty.h>
+#include <linux/gfp.h>
+#include <linux/ioport.h>
+#include <linux/serial.h>
+#include <linux/console.h>
+#include <linux/sysrq.h>
+#include <linux/device.h>
+#include <linux/bootmem.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/fs_pd.h>
+
+#include <linux/serial_core.h>
+#include <linux/kernel.h>
+
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include "cpm_uart.h"
+
+/**************************************************************/
+
+void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
+{
+       cpm_command(port->command, cmd);
+}
+
+void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port,
+                               struct device_node *np)
+{
+       return of_iomap(np, 1);
+}
+
+void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram)
+{
+       iounmap(pram);
+}
+
+/*
+ * Allocate DP-Ram and memory buffers. We need to allocate a transmit and
+ * receive buffer descriptors from dual port ram, and a character
+ * buffer area from host mem. If we are allocating for the console we need
+ * to do it from bootmem
+ */
+int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con)
+{
+       int dpmemsz, memsz;
+       u8 *dp_mem;
+       unsigned long dp_offset;
+       u8 *mem_addr;
+       dma_addr_t dma_addr = 0;
+
+       pr_debug("CPM uart[%d]:allocbuf\n", pinfo->port.line);
+
+       dpmemsz = sizeof(cbd_t) * (pinfo->rx_nrfifos + pinfo->tx_nrfifos);
+       dp_offset = cpm_dpalloc(dpmemsz, 8);
+       if (IS_ERR_VALUE(dp_offset)) {
+               printk(KERN_ERR
+                      "cpm_uart_cpm1.c: could not allocate buffer descriptors\n");
+               return -ENOMEM;
+       }
+       dp_mem = cpm_dpram_addr(dp_offset);
+
+       memsz = L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize) +
+           L1_CACHE_ALIGN(pinfo->tx_nrfifos * pinfo->tx_fifosize);
+       if (is_con) {
+               /* was hostalloc but changed cause it blows away the */
+               /* large tlb mapping when pinning the kernel area    */
+               mem_addr = (u8 *) cpm_dpram_addr(cpm_dpalloc(memsz, 8));
+               dma_addr = (u32)cpm_dpram_phys(mem_addr);
+       } else
+               mem_addr = dma_alloc_coherent(pinfo->port.dev, memsz, &dma_addr,
+                                             GFP_KERNEL);
+
+       if (mem_addr == NULL) {
+               cpm_dpfree(dp_offset);
+               printk(KERN_ERR
+                      "cpm_uart_cpm1.c: could not allocate coherent memory\n");
+               return -ENOMEM;
+       }
+
+       pinfo->dp_addr = dp_offset;
+       pinfo->mem_addr = mem_addr;             /*  virtual address*/
+       pinfo->dma_addr = dma_addr;             /*  physical address*/
+       pinfo->mem_size = memsz;
+
+       pinfo->rx_buf = mem_addr;
+       pinfo->tx_buf = pinfo->rx_buf + L1_CACHE_ALIGN(pinfo->rx_nrfifos
+                                                      * pinfo->rx_fifosize);
+
+       pinfo->rx_bd_base = (cbd_t __iomem __force *)dp_mem;
+       pinfo->tx_bd_base = pinfo->rx_bd_base + pinfo->rx_nrfifos;
+
+       return 0;
+}
+
+void cpm_uart_freebuf(struct uart_cpm_port *pinfo)
+{
+       dma_free_coherent(pinfo->port.dev, L1_CACHE_ALIGN(pinfo->rx_nrfifos *
+                                                         pinfo->rx_fifosize) +
+                         L1_CACHE_ALIGN(pinfo->tx_nrfifos *
+                                        pinfo->tx_fifosize), pinfo->mem_addr,
+                         pinfo->dma_addr);
+
+       cpm_dpfree(pinfo->dp_addr);
+}