1 files changed, 174 insertions, 0 deletions

diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c
new file mode 100644
index 00000000000..814ac006393
--- /dev/null
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c
@@ -0,0 +1,174 @@
+/*
+ *  linux/drivers/serial/cpm_uart_cpm2.c
+ *
+ *  Driver for CPM (SCC/SMC) serial ports; CPM2 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/ioport.h>
+#include <linux/slab.h>
+#include <linux/init.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 <asm/prom.h>
+
+#include <linux/serial_core.h>
+#include <linux/kernel.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)
+{
+        void __iomem *pram;
+        unsigned long offset;
+        struct resource res;
+        resource_size_t len;
+
+        /* Don't remap parameter RAM if it has already been initialized
+         * during console setup.
+         */
+        if (IS_SMC(port) && port->smcup)
+                return port->smcup;
+        else if (!IS_SMC(port) && port->sccup)
+                return port->sccup;
+
+        if (of_address_to_resource(np, 1, &res))
+                return NULL;
+
+        len = resource_size(&res);
+        pram = ioremap(res.start, len);
+        if (!pram)
+                return NULL;
+
+        if (!IS_SMC(port))
+                return pram;
+
+        if (len != 2) {
+                printk(KERN_WARNING "cpm_uart[%d]: device tree references "
+                        "SMC pram, using boot loader/wrapper pram mapping. "
+                        "Please fix your device tree to reference the pram "
+                        "base register instead.\n",
+                        port->port.line);
+                return pram;
+        }
+
+        offset = cpm_dpalloc(PROFF_SMC_SIZE, 64);
+        out_be16(pram, offset);
+        iounmap(pram);
+        return cpm_muram_addr(offset);
+}
+
+void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram)
+{
+        if (!IS_SMC(port))
+                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 __iomem *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_cpm.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) {
+                mem_addr = kzalloc(memsz, GFP_NOWAIT);
+                dma_addr = virt_to_bus(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_cpm.c: could not allocate coherent memory\n");
+                return -ENOMEM;
+        }
+
+        pinfo->dp_addr = dp_offset;
+        pinfo->mem_addr = mem_addr;
+        pinfo->dma_addr = dma_addr;
+        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 *)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), (void __force *)pinfo->mem_addr,
+                          pinfo->dma_addr);
+
+        cpm_dpfree(pinfo->dp_addr);
+}